Update README for gitlab migration

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

README.md

@@ -2,7 +2,7 @@ About libxcb
 ============
 
 libxcb provides an interface to the X Window System protocol, which
-replaces the current Xlib interface. It has several advantages over
+replaces the traditional Xlib interface. It has several advantages over
 Xlib, including:
 - size: small, simple library, and lower memory footprint
 - latency hiding: batch several requests and wait for the replies later
@@ -10,27 +10,32 @@ Xlib, including:
 - proven thread support: transparently access XCB from multiple threads
 - easy extension implementation: interfaces auto-generated from XML-XCB
 
-Xlib can also use XCB as a transport layer, allowing software to make
+Xlib also uses XCB as a transport layer, allowing software to make
 requests and receive responses with both, which eases porting to XCB.
 However, client programs, libraries, and toolkits will gain the most
 benefit from a native XCB port.
 
+More information about xcb is available from our website:
 
-Please report any issues you find to the freedesktop.org bug tracker,
-at:
+  https://xcb.freedesktop.org/
 
-	<https://bugs.freedesktop.org/enter_bug.cgi?product=XCB>
+Please report any issues you find to the freedesktop.org bug tracker at:
+
+  https://gitlab.freedesktop.org/xorg/lib/libxcb/issues
 
 Discussion about XCB occurs on the XCB mailing list:
 
-        <mailto:xcb at lists.freedesktop.org>
-        <http://lists.freedesktop.org/mailman/listinfo/xcb>
+  https://lists.freedesktop.org/mailman/listinfo/xcb
 
-You can obtain the latest development versions of XCB using GIT.
-For anonymous checkouts, use:
+You can obtain the latest development versions of XCB using GIT from
+the libxcb code repository at:
 
-        git clone git://anongit.freedesktop.org/git/xcb/libxcb
+  https://gitlab.freedesktop.org/xorg/lib/libxcb
 
-For developers, use:
+  For anonymous checkouts, use:
 
-        git clone git+ssh://git.freedesktop.org/git/xcb/libxcb
+    git clone https://gitlab.freedesktop.org/xorg/lib/libxcb.git
+
+  For developers, use:
+
+    git clone git@gitlab.freedesktop.org:xorg/lib/libxcb.git