Default port to 11211

Update for Default port to 11211 in URLs #207 
The (.*) is to match any IP address that is defined when connecting. The {1,} is for (\d+), in other words (\d+){1,}$ is to detect any presence of port number. If no port number is detected regardless of any IP address, the 11211 will be appended as default port. Actually i just used the same regular expression as originally defined in line 140.