Set explicit Perl 5.12 port dependency for xml-dom and xml-parser
as corresponding to macports r110696
remove dependency on autoconf, automake and libtool (implied by us_autoconf)
move symbolic link in ${prefix}/share/ from port globus-clients to igtf-certificates;
Merge github.com:dvandok/globus-macports into macports

Conflicts:
	ports/globus-core/Portfile