(Result_holder): Removed text_list.

Improve documentation.
Start using the Local_to_global structure.
Fixes and improvements to the Local_to_global structure.
Improve the test suite with new tests of the Local_to_global structure.

	Local_to_global structure.

	member is now a l2g.
(cache_sync): Fixed type in some printf format strings.

(delete_list_append): New static function.
(execute_deletions): New static function.
(check_misc_infos): Adjusted to the fact that the texts member of
	Conference is now a l2g.
(adjust_text_list): Deleted.
(check_created_texts): The "created" argument now points to a
	Local_to_global.  Removed the check for "bad created_texts array"
	since it can no longer be bad in that way.
(check_membership): Adjusted to the fact that the texts member of
	Conference is now a l2g.
(check_texts_in_conf): The "tlist" argument now points to a
	Local_to_global.  Removed the check for "bad created_texts array"
	since it can no longer be bad in that way.

stdlib.h if HAVE_STDLIB_H.  Include stdio.h if we didn't get NULL
from stdlib.h.  Inlucd lyskomd.h and server/smalloc.h.
(L2G_BLOCKSIZE): Moved here from local-to-global.h.
(struct l2g_block_info): Likewise.
(is_dense): New static function.
(is_empty): New static function.
(key_value): New static function.
(sparse_skip_deleted): New static function.
(sparse_locate_value): New static function.
(sparse_compact): New static function.
(add_block): Use srealloc instead of realloc.  Don't initialize
	start -- the caller is responsible for doing so.
(delete_block): Use sfree instead of free, and srealloc instead of
	realloc.
(make_sparse): Don't change the value of start, since there is no
	need to, and make_sparse may now be called on an empty block,
	which would cause start to be set to a garbage value.
(find_block): Added a const qualifier to the return value and l2g
	argument.  Use key_value to simplify code.
(find_block_index_key): Added a const qualifier to the l2g
	argument.  Use helper functions to simplify the code.  Use
	sparse_skip_deleted so that the function never returns a deleted
	key.  Never return deleted keys in dense blocks either.
(join_range): New static function.
(join_blocks): New static function.
(l2g_init): Set first_unused to 1.
(l2g_clear): Use sfree instead of free.  Set first_unused to 1.
(l2g_copy): Added const qualifier to the src argument.  Simplified
	code by using helper functions and relying on the fact that
	calling l2g_append with a Text_no=0 is a no-op.  Set first_unused
	of the copy.
(l2g_append): Send a log message and do nothing if an attempt to
	set a local number lower than first_unused is detected.  Set
	first_unused.  Fixed the logic about when to add a new block, when
	to compact the last block, and when to make it sparse.  Simplify
	code by using the helper functions.
(l2g_delete): Don't increase the zeroes counter if a zero is
	deleted.  Delete the entire block if it became empty.  Attempt to
	join this block to its neighbors.  Compact the block if it was
	sparse and contained too many deleted entries.
(l2g_lookup): Added const qualifier to the l2g argument.  Don't
	return uninitialized data.  Use helper functions to simplify code
	and make it slightly faster.
(l2g_next_key): Added const qualifier to the l2g argument.
(l2g_first_appendable_key): New function.
(l2g_delete_global_in_sorted): New function.
(l2g_compact): Removed.
(l2g_dump): Switch placement of l2g and file arguments to match
	other similar functions in the lyskomd code.  Added const
	qualifier.  Dump first_unused.  Use helper functions to simplify
	code.
(l2g_read): Switch placement of l2g and file arguments to match
	other similar functions in the lyskomd code.  Read first_unused.
	Return a success indicator.  Detect unexpected EOF conditions.
(l2g_write): Switch placement of l2g and file arguments to match
	other similar functions in the lyskomd code.  Write first_unused.
	Use helper functions to simplify code.
(l2gi_searchall): Added const qualifier to the l2g argument.
	Simplify code by calling l2gi_searchsome instead of duplicating
	the code.
(l2gi_searchsome): Added const qualifier to the l2g argument.
	Complain if the begin argument is less than 1.  Don't forget to
	initialize search_ended.  Set beginval.  Giving end==0 means that
	the iterator should continue to the end of the set.  Use helper
	functions to simplify the code.
(l2gi_next): Use helper functions to simplify code.  The iterator
	is unlimited if endval==0.
(l2gi_begin): New function.
(l2gi_end): New function.

	Conference is now a l2g.
(adjust_read): Likewise.
(mark_as_read): Likewise.
(check_membership): Likewise.
(set_unread): Likewise.
(set_last_read): Likewise.

(copy_text_list): Removed.
(clear_conference): Adjusted to the fact that the texts member of
	Conference is now a l2g.
(init_conference): Likewise.
(copy_conference): Likewise.  Added const qualifier to the argument.
(clear_person): Adjusted to the fact that the created_texts member
	of Person is now a l2g.
(copy_person): Likewise.
(init_person): Likewise.
(init_text_list): Removed.
(copy_aux_item_list): Added const qualifier to the src argument.

	of Person is now a l2g.
(get_created_texts): The return value is now an
	l2g_iterator_as_text_list, not a Text_list.  Adjusted to the
	fact that the created_texts member of Person is now a l2g.

	member of Person is now a l2g.
(prot_a_output_conference): Adjusted to the fact that the texts
 	member of Conference is now a l2g.
(prot_a_output_conference_old): Likewise.
(prot_a_output_l2g_iterator_as_text_list): New function which
	emulates a Text_list.

(foutput_person_2): Use l2g_write instead of foutput_text_list.
(foutput_conference_2): Likewise.
(foutput_conference_1): Adjusted to new API of foutput_text_list.
(foutput_conference_0): Likewise.
(foutput_text_list): The text_list argument is now a pointer to
	Local_to_global instead of a Text_list.  The generated output is
	still the same.
(foutput_ulong): Eliminated a future buffer overrun.  Cleaned up the code.

(fparse_person_2): Likewise.
(fparse_text_list): The result argument now points to a
	Local_to_global instead of a Text_list.

	member of Conference is now a l2g.
(setup_small_conf): Likewise.

	Conference is now a l2g.
(do_sub_recpt): Likewise.
(set_loc_no): Removed.
(adjust_text_list): Removed.
(do_delete_text): Adjusted to the fact that the created_texts
 	member of Person is now a l2g.
(do_create_text): Likewise.
(get_map): The result argument now points to a
 	l2g_iterator_as_text_list instead of a Text_list.  Adjusted to the
 	fact that the texts member of Conference is now a l2g.

	Local_to_global instead of a Text_list.

(get_created_texts): Likewise.

(copy_aux_item_list): Likewise.
(init_text_list): Removed.

(all-recursive, check-recursive): Require libcheck.a to be built.

(Result_holder): Added l2g_iterator_as_text_list.

	L2g_iterator_as_text_list.
(get_map): Likewise.

(Local_to_global): New type.
(L2g_iterator): New type.
(L2g_iterator_as_text_list): New type.
(Conference): The texts member is now a Local_to_global, not a Text_list.
(Person): The created_texts member is now a Local_to_global, not a Text_list.

Added the 'i' command that tests iterators.  Adjusted to the new API
of l2g_dump, l2g_read and l2g_write.  Require an extra trailing
newline after the representation l2g_read expects when the 'r' command
is used, and produce a corresponding newline with the 'w' command.
Renamed the 'p' command to 'w'.

(simple_expect): Added a missing space in a prompt regexp.

the test case.  Comments added.  Expect the "u" command to print
first_unused.

(L2g_block_info): Likewise.
(Local_to_global): Likewise.
(l2g_copy): Switched placement of src and dest to match other copy
	functions in the lyskomd code.  Added const qualifier.
(l2g_lookup): Added const qualifier to the l2g argument.
(l2g_next_key): Likewise.
(l2g_compact): Removed.
(l2g_first_appendable_key): New function.
(l2g_delete_global_in_sorted): New function.
(l2g_dump): Switch placement of l2g and file arguments to match
	other similar functions in the lyskomd code.  Added const
	qualifier.
(l2g_write): Likewise.
(l2g_read): Likewise.
(l2g_searchall): Added const qualifier.
(L2g_iterator): Moved to kom-types.h.
(l2gi_searchsome): Added const qualifier.
(l2gi_begin): New function.
(l2gi_end): New function.