otr doesn’t heed the require_encryption option

My otr.cfg looks like this:

[otr]
log = true
require_encryption = true

The log is kept, but it doesn’t switch to encrypted communication by default and I can still send messages.

• Changesets:
  • Revision b242ea24 by mathieui on 2016-02-02T19:05:18Z:

Fix #3150 (otr and require_encryption)

the require_encryption option would not be honored when opening a new
tab with a bare JID.