don't set use_stun_server as True by default. It's useless when there is no stun server configured. Fixes #6935

mercurial python module is not installed in site-packages under windows. use hg binary instead to get current revision

Also use sed to remove now unneeded Vim lines, 2to3 -f ws_comma to fix
some whitespace, and fix some other madness manually.

also use 2to3 -f ws_comma to fix some whitespace

holy diff batman!

That way we can search through all logs in constant time instead of having to perform a full table scan.

Those variables were confusing because autoconf usually defines DATADIR to
PREFIX/share and gajim uses both defs.datadir=PREFIX/share/gajim and
gajim.DATA_DIR=PREFIX/share/gajim/data.

Now, autoconf will use PKGDATADIR for setting the (renamed) defs.basedir
variable which will be used to set gajimpaths['DATA_DIR'] and
gajimpaths['ICONS_DIR'] in configpaths.py

Gajim will also looks for the ${GAJIM_BASEDIR} environment variable instead of
${datadir} which was really too generic (no namespace).

Thanks Asterix for the initial version of this patch!