Enable the ZRTP (encryption) option -- and bump PORTREVISION.

While here, arrange for the bundled mediastreamer2/ and oRTP/
subdirectories to not be extracted from the tarball -- we build
them separately from ports of their own anyway.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375387 35697150-7ecd-e111-bb59-0022644237b5
sysutils/firstboot-growfs: revive

Revive this port as it will still be useful until the similar functionality in
base is more widely available, take ownership.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375388 35697150-7ecd-e111-bb59-0022644237b5