devel/pdcurses: Update to 3.5

Additional port changes:

• Changed to DISTVERSION
• Added LICENSE=PD (PD is in the project name)
• Added to USE_XORG
• WRKSRC is now needed due to project tree restructuring
• MAKE_ARGS is needed since Makefile doesn't know some variables, and build is not standard
• Moved patching from post-patch to files/
• Added SONAME to the shared lib
• Fixed some oddness with $(srcdir) in Makefile.in

Reported SONAME and $srcdir problems to the upstream maintainer.

Testing:

• Ran few testcases
• Built 2 depending ports

Reported by: portscout
Approved by: tcberner (mentor, implicit)