[Gc] URL typo in welcome-to-list email

[Jim Meyering]

There is a typo in the URL of the welcome message:

---------------------
    Welcome to the Gc at linux.hpl.hp.com mailing list!

    To post to this list, send your email to:

      gc at linux.hpl.hp.com

    An archive is maintained at:

      http://www.hpl.hp.com/hosted/linux/mail-archives/Gc
    ...
---------------------
That should be a lower-case "gc", not "Gc":

      http://www.hpl.hp.com/hosted/linux/mail-archives/gc