Old IOS versions show the tacacs server key in plain text even whith
"service password-encryption" set without prepending a "0 " to show
that. This patch fixes the removal of the tacacs key in that case.

Michael Stefaniuc <mstefani@redhat.com>

--- ./bin/rancid.in.tacacs	2007-02-07 15:00:02.000000000 +0100
+++ ./bin/rancid.in	2007-02-07 15:01:17.000000000 +0100
@@ -1661,7 +1661,7 @@
 	    }
 	}
 	# prune tacacs/radius server keys
-	if (/^((tacacs-server|radius-server)\s(\w*[-\s(\s\S+])*\s?key) \d \w+/
+	if (/^((tacacs-server|radius-server)\s(\w*[-\s(\s\S+])*\s?key) (\d )?\w+/
 							&& $filter_pwds >= 1) {
 	    ProcessHistory("","","","!$1 <removed>$'"); next;
 	}