Test NDEBUG instead of DEBUG.

Use $(srcdir) for *.c and *.h.

Test NDEBUG instead of DEBUG.

Use configure to set NDEBUG, LOGACCESSES or NDEFENSIVE_CHECKS instead.

is written to the log file.

message to stderr, exit with exit status != 0, and count on cron to
deliver the message to whoever should get it.

Kill lyskomd if etc/status exists.
Use ldifftime(), not difftime().

simple-cache.c should now use a lot less memory.
New format of the log file, including the pid.
Use ldifftime() instead of difftime().