a bunch of cleanups to the datetime stuff in irssi
removed the _get_day and _get_month functions and replaced them with a _get_day_and_month function
avoided a need for local time_t's and instead made the _get_day_and_month function return it
avoided allocating memory when it wasn't necessary
#
# pidgin_major_ver and pidgin_minor_ver should be defined to match the minimum
# Pidgin API version _required_ to build Plugin Pack
# Due to the way Pidgin checks plugin versions, we need to also ensure that
# the correct minimum version of Pidgin is Require:'d based on what version of