The ssl_ciper_get_evp() function is currently overloaded to also return the
compression associated with the SSL session. Based on one of Adam Langley's
chromium diffs, factor out the compression handling code into a separate
ssl_cipher_get_comp() function.

Rewrite the compression handling code to avoid pointless duplication and so
that failures are actually returned to and detectable by the caller.

ok miod@
Turn off MemCheck_on and MemCheck_off. These calls are pointless since the
crypto memory debugging code has been castrated.

ok miod@ "kill it" beck@