[FIXED HUDSON-1888] 'extssh' is a valid protocol in CVS nowadays.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@10234 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/scm/CVSSCM.java

@@ -1163,7 +1163,7 @@ public class CVSSCM extends SCM implements Serializable {
         }
 
         private static final Pattern CVSROOT_PSERVER_PATTERN =
-            Pattern.compile(":(ext|pserver):[^@:]+(:[^@:]+)?@[^:]+:(\\d+:)?.+");
+            Pattern.compile(":(ext|extssh|pserver):[^@:]+(:[^@:]+)?@[^:]+:(\\d+:)?.+");
 
         /**
          * Runs cvs login command.