net/gkrellmmultiping2 : update and take maintainership

This updates net/gkrellmmultiping2 from 2.0.3_3 to 2.0.8 and
transmits maintainership from ports@freebsd.org to me.

Added files: none
Deleted files: pkg-plist

PR: ports/76011
Submitted by: Tobias Roth <ports@fsck.ch>