Add pref dom.url.encode_hash from https://bug1093611.bugzilla.mozilla.org/attachment.cgi?id=8524669
Add pref dom.url.encode_hash from https://bug1093611.bugzilla.mozilla.org/attachment.cgi?id=8524669

MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,MozillaSecurity/funfuzz