Rename ssl3_send_alert and ssl3_protocol_version.

These are common between TLS and DTLS so should not have the ssl3_
prefix. (TLS-only stuff should really have a tls_ prefix, but we still
have a lot of that one.)

This also fixes a stray reference to ssl3_send_client_key_exchange..

Change-Id: Ia05b360aa090ab3b5f075d5f80f133cbfe0520d4
Reviewed-on: https://boringssl-review.googlesource.com/21346
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Steven Valdez <svaldez@google.com>
diff --git a/ssl/ssl_session.cc b/ssl/ssl_session.cc
index aff9c0f..ea3c53f 100644
--- a/ssl/ssl_session.cc
+++ b/ssl/ssl_session.cc
@@ -377,7 +377,7 @@
   ssl_get_current_time(ssl, &now);
   session->time = now.tv_sec;
 
-  uint16_t version = ssl3_protocol_version(ssl);
+  uint16_t version = ssl_protocol_version(ssl);
   if (version >= TLS1_3_VERSION) {
     // TLS 1.3 uses tickets as authenticators, so we are willing to use them for
     // longer.