mountain -> town, fixes f5b8fe9e5608e531009867907d39dcd5217ea877

Maumakeogh name is replaced by Mastergeehy as that is a proper Irish town name and not a mountain and thus follows the "name after town in $COUNTRY" as Patric said in the USENET thread. (Mastergeehy is a southwestern town near the town of Sneem.)

USENET thread link:  http://groups.google.com/group/rec.games.roguelike.nethack/browse_thread/thread/c857cc3d833f84b5/fcc8f2d24a6fc4c0%3Fie%3Dutf-8%26oe%3Dutf-8%26q%3DNethack%2Bshopkeeper%2Bmissing%2Bnames%23fcc8f2d24a6fc4c0&ei=h71yUaXXMYTilQeA1NXaDQ&sa=t&ct=res&cd=1&source=groups&usg=AFQjCNGE8WWkcCjTAN8EMw9LX4hRazcNoA