Remove the 'ssl_' prefix on most SSL_PROTOCOL_METHOD hooks.

It doesn't really convey anything useful. Leave ssl_get_message alone for now
since it's called everywhere in the handshake and I'm about to tweak it
further.

Change-Id: I6f3a74c170e818f624be8fbe5cf6b796353406df
Reviewed-on: https://boringssl-review.googlesource.com/8430
Reviewed-by: Adam Langley <agl@google.com>

ssl/d1_pkt.c

diff --git a/ssl/d1_pkt.c b/ssl/d1_pkt.c
index b821ab3..824a00c 100644
--- a/ssl/d1_pkt.c
+++ b/ssl/d1_pkt.c
@@ -362,7 +362,7 @@
 
   /* If we have an alert to send, lets send it */
   if (ssl->s3->alert_dispatch) {
-    int ret = ssl->method->ssl_dispatch_alert(ssl);
+    int ret = ssl->method->dispatch_alert(ssl);
     if (ret <= 0) {
       return ret;
     }