Fix some out of date comments

Fix various references to s3_clnt.c and s3_srvr.c which don't exist
any more.

GitHub Issue #765

Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/statem/statem_clnt.c

diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index 8da3e9b..05651d5 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -1352,7 +1352,7 @@
     s->session->peer_chain = sk;
     /*
      * Inconsistency alert: cert_chain does include the peer's certificate,
-     * which we don't include in s3_srvr.c
+     * which we don't include in statem_srvr.c
      */
     x = sk_X509_value(sk, 0);
     sk = NULL;

ssl/statem/statem_srvr.c

diff --git a/ssl/statem/statem_srvr.c b/ssl/statem/statem_srvr.c
index 8aa0915..3294be9 100644
--- a/ssl/statem/statem_srvr.c
+++ b/ssl/statem/statem_srvr.c
@@ -368,7 +368,7 @@
            && (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
            /*
             * ... except when the application insists on
-            * verification (against the specs, but s3_clnt.c accepts
+            * verification (against the specs, but statem_clnt.c accepts
             * this for SSL 3)
             */
                || (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
@@ -2931,7 +2931,7 @@
     s->session->peer_chain = sk;
     /*
      * Inconsistency alert: cert_chain does *not* include the peer's own
-     * certificate, while we do include it in s3_clnt.c
+     * certificate, while we do include it in statem_clnt.c
      */
     sk = NULL;
     ret = MSG_PROCESS_CONTINUE_READING;