Fixed bad printf in var.c
Fixed DSO linking problem on Linux
Fixed bad printf
Added mopherd_cleanup running atexit, resolves #23
Create control socket before server thread is started, fixes #24
Write PID file before calling milter_init
Reordered milter shutdown sequence
Added tests to mopherd.acl.test
Fixed bad NULL handling in math operations and corrected operator precedence
Added more tests to mopherd.acl.test
Fixed hang on configuration errors
Increased dbt.c BUFLEN to 8k
Cosmetics
Fixed typo in dbt.c
fix DSO linking (v2)

Linking with --as-needed was never really a problem.  It did, however,
uncover our incorrect flag-order.

http://fedoraproject.org/wiki/UnderstandingDSOLinkChange
update regdom rules
prepare for 0.5.2