"position" and "added-at" fields.  (Bug 198, reported by Kent.)

More Bugzilla references added.

	but there is no reason to build the libcheck.a library unless
	we are running the checks.
(all-recursive): Don't depend on libcheck.a.

(login): Ditto.  (Bug 151).

	logins_allowed.  (Bug 151).

Removed the unused pom.c and pom.h files.  We don't have explicit
permission to distribute them under GPL.

do_sub_footnote.

(do_sub_comment): Use it to simplify code.
(do_sub_footnote): Ditto.  (Bug 186).

do_add_bcc_recpt.  (Bug 190).

	an additional Info_type argument that specifies what kind of
	recipient to add.
(do_add_recpt): Function removed.
(do_add_cc_recpt): Function removed.
(do_add_bcc_recpt): Function removed.
(create_text_add_miscs): Use do_add_recipient.  Simplify code.
(add_recipient): Ditto. (Bug 190).

to handle recpt, cc_recpt and bcc_recpt by the same code in many
places, resulting in the removal of approximately 300 lines of code.
(Bug 139).

	instead.  Removed comment_to, commented_in, footnote_to and
	footnoted_in, and added text_link as a replacement.

(is_footnote_to, is_footnoted_in): Adjusted to Info_datum unification.
(is_recipient): Adjusted to Info_datum unification.  Simplified code.

	Simplified code.