Changed result execution logging to use a var_expand_table created by liblda to avoid code duplication (patch by Timo Sirainen).

Vacation extension: from address of reply is now by default equal to whatever known recipient alias matched the headers of the message.

Spamtest and virustest extensions: discarded whitespace at beginning of regexp and added syntax testsuite tests.

Omitted 'extern' in two declarations of global variables in header files, causing compile failures on certain systems.

Fixed small bug in the i;ascii-numeric comparator and added extensive relational tests to the testsuite.