Do not ignore TLS errors

Currently, Epiphany loads web pages even though it realizes the
connection may be insecure, displaying a broken lock in the address bar.
By this point, it's too late: the attacker already has your session
cookies. Display an error page instead. Based on groundwork by Brian
Holt.

https://bugzilla.gnome.org/show_bug.cgi?id=708847
Updated Hebrew translation