Change default shared secret for TLS and DTLS.

We change from "mysecret" to "radsec" as per
draft-ietf-radext-radsec-12.txt section 2.3 (4).

ChangeLog

 2011-12-22 1.6-dev
+	Incompatible changes:
+	- The default shared secret for TLS and DTLS connections change
+	from "mysecret" to "radsec" as per draft-ietf-radext-radsec-12.txt
+	section 2.3 (4).  Please make sure to specify a secret in both
+	client and server blocks to avoid unwanted surprises.
+
 	New features:
 	- Improved F-Ticks logging options.  F-Ticks can now be sent to a
 	separate syslog facility and the VISINST label can now be

dtls.c

@@ -46,7 +46,7 @@ void initextradtls();
 
 static const struct protodefs protodefs = {
     "dtls",
-    "mysecret", /* secretdefault */
+    "radsec", /* secretdefault */
     SOCK_DGRAM, /* socktype */
     "2083", /* portdefault */
     REQUEST_RETRY_COUNT, /* retrycountdefault */

tls.c

@@ -43,7 +43,7 @@ void tlssetsrcres();
 
 static const struct protodefs protodefs = {
     "tls",
-    "mysecret", /* secretdefault */
+    "radsec", /* secretdefault */
     SOCK_STREAM, /* socktype */
     "2083", /* portdefault */
     0, /* retrycountdefault */