README: git lives at http://git-scm.com these days

Signed-off-by: Stefan Naewe <stefan.naewe+git@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

README

@@ -37,7 +37,7 @@ CVS users may also want to read Documentation/gitcvs-migration.txt
 ("man gitcvs-migration" or "git help cvs-migration" if git is
 installed).
-Many Git online resources are accessible from http://git.or.cz/
+Many Git online resources are accessible from http://git-scm.com/
 including full documentation and Git related tools.
 The user discussion and development of Git take place on the Git