Backport change from 1.2.0: configure.in,doc/Makefile.am,doc/survex.1.in,doc/survex.7.in: Move survex man page to section 7 (since it isn't documenting an actual command).
git-svn-id: file:///home/survex-svn/survex/branches/1.0@3693 4b37db11-9a0c-4f06-9ece-9ab7cdaee568