ssl_ciphersuite - add new compat mode

add a new compatibility mode besides
the existing

"compat" (which doesn't disable SSLv3)
"strong" (requires Apache 2.4)

called "compatnossl" (yea, give me a better one)
that is like compat so it can work on 2.2
but still disables SSL3

then, use it on ytterbium, for gerrit

Change-Id: I0cff61a2d86060e8c3bd6197eeb5666fee3168dc
Merge "ssl_ciphersuite - add new compat mode" into production