Also change http:// to https:// for url that would automatically
redirect to the later.

* doc/mainpage.dox, doc/org/dstar2tgba.org, doc/org/ltl2tgba.org,
doc/org/ltlcross.org, doc/org/satmin.org, doc/org/tools.org,
src/ltlvisit/dot.hh, src/misc/hashfunc.hh, wrap/python/ajax/trans.html:
Here.