fix gotmarc(1) to set PERL5LIB when running in-repo however to load the right GotMArc.pm.

msearchd will also make use of it.

These programs don't need to read files in the current directory: GotMArc loads in memory some files at load time, at that point no other accesses to "." are needed.

avoids the "Wide character in print at ./mkindex line 152, <> line 2751" warnings.

pick up the *latest* From/Date for the indexes, not what happened to be the last mail rendered in that thread. spotted by stsp@

reminded by semarie@, thanks!