MFH: r413326 r413726 r413760
www/firefox{,-esr}: update to 46.0 (rc5) / 45.1esr
Changes: https://www.mozilla.org/firefox/46.0/releasenotes/
Changes: https://www.mozilla.org/firefox/45.1.0/releasenotes/
Security: 92d44f83-a7bf-41cf-91ee-3d1b8ecf579f
Approved by: ports-secteam (junovitch)