x11-fonts/font-manager: Switch from using Google Code to GitHub

Also

• New MAINTAINER, portmaster@bsdforge.com
• Update LIB_DEPENDS
• Redo patches to silence portlint warnings
• Add NLS_USES_OFF=gettext-runtime, because even when configured using --disable-nls, fontutils.so is still linked to lib/libintl.so.x.

PR: 216988
Submitted by: portmaster@bsdforge.com (new maintainer)
Approved by: swills (mentor, implicit)