Fixed #540: check_process performance data fails if daemon has a '.'

plugins/check_process

@@ -52,13 +52,14 @@ class process:
     """
     String representation for performance
     """
+    procname = str.replace(self.comm, '.', '-')
     return "'%s instances'=%d '%s cpu'=%.2f%% '%s mem'=%.2f%% '%s thr'=%d '%s conn'=%d '%s fd'=%d" % \
-              (self.comm, len(self.pid),
-               self.comm, self.cpu, 
-               self.comm, self.mem,
-               self.comm, self.thr,
-               self.comm, self.conn,
-               self.comm, self.fd)
+              (procname, len(self.pid),
+               procname, self.cpu, 
+               procname, self.mem,
+               procname, self.thr,
+               procname, self.conn,
+               procname, self.fd)
 
 class check_process:
   "Checks a process activity"