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_versions.cc b/ssl/ssl_versions.cc
index 56653b1..ccae6ef 100644
--- a/ssl/ssl_versions.cc
+++ b/ssl/ssl_versions.cc
@@ -287,7 +287,7 @@
   return ssl->version;
 }
 
-uint16_t ssl3_protocol_version(const SSL *ssl) {
+uint16_t ssl_protocol_version(const SSL *ssl) {
   assert(ssl->s3->have_version);
   uint16_t version;
   if (!ssl_protocol_version_from_wire(&version, ssl->version)) {