Bug 784816 - useSSL argument transition. r=asuth

This is an updated version of :kk1fff's
https://github.com/mozilla-b2g/gaia/pull/11783
propagated back to gaia-email-libs-and-more with my desired review change of a
comment added.
Merge pull request #241 from asutherland/tcpsocket-crypto-transition

Bug 784816 - useSSL argument transition. r=asuth

I tested with patched b2g-desktop and unpatched.