Hi, @proxy-maint team: Please rename shorewall-4.6.13.ebuild to shorewall-4.6.13.1.ebuild (minor bugfix). I won't stabilize shorewall-4.6.13... Thanks!
commit ac2eb68409ddc1df096e3090ac49f0259808a44e Author: Ian Delaney <idella4@gentoo.org> Date: Sat Sep 26 17:08:40 2015 +0800 net-firewall/shorewall: bump to -4.6.13.1