NTP is now release candidate with 4.2.7p484.

Upline now uses devel branch for release candidates,
thus remove net/ntp-rc.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374566 35697150-7ecd-e111-bb59-0022644237b5
Update distinfo.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374567 35697150-7ecd-e111-bb59-0022644237b5