commands. /RUN -> /SCRIPT LOAD, /PERLFLUSH -> /SCRIPT FLUSH, /PERL ->
/SCRIPT EXEC. Added /SCRIPT UNLOAD, /SCRIPT LIST. Lots of cleanups.
filename_complete() has extra argument for "default directory" which is
searched if no path is given when completing.
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@1680 dbcabf3a-b0e7-0310-adc4-f8d773084564
