net/multicat: Update to 2.3, new maintainer

• pkg-descr: WWW: changed to https://
• Makefile ordering: PORTDOCS and PKG_PLIST swapped (portclippy suggestion)
• extra patch of the file "patch" successfully ignored :-)
• set MAINTAINER (was unmaintained)

PR: 241982
Submitted by: Michael Muenz <m.muenz@gmail.com> (new maintainer)