Clean up URLs to point to GitLab

This moves URL references to old Trac to their corresponding
GitLab counterparts.

This patch does not update the submodule library, such as
libraries/Cabal.

See also !539, !606, !618

[ci skip]

ANNOUNCE

@@ -79,7 +79,7 @@ On-line GHC-related resources
 Relevant URLs:
 
 GHC home page              https://www.haskell.org/ghc/
-GHC developers' home page  https://ghc.haskell.org/trac/ghc/
+GHC developers' home page  https://gitlab.haskell.org/ghc/ghc/wikis/
 Haskell home page          https://www.haskell.org/
 
 
@@ -103,7 +103,7 @@ We welcome new contributors. Instructions on accessing our source code
 repository, and getting started with hacking on GHC, are available from the
 GHC's developer's site:
 
-    https://ghc.haskell.org/trac/ghc/
+    https://gitlab.haskell.org/ghc/ghc/wikis/
 
 
 Mailing lists

distrib/README

@@ -10,7 +10,7 @@ For more information, visit GHC's web site:
 
 Information for developers of GHC can be found here:
 
-  http://ghc.haskell.org/trac/ghc/
+  https://gitlab.haskell.org/ghc/ghc/wikis/
 
 
 For installation instructions, see the accompanying INSTALL file.

docs/index.html.in

@@ -50,7 +50,7 @@
     <P>For more information, see the following:</P>
     <UL>
       <LI><P><A href="http://www.haskell.org/ghc/">GHC Home Page</A></P></LI>
-      <LI><P><A href="http://ghc.haskell.org/trac/ghc/">
+      <LI><P><A href="https://gitlab.haskell.org/ghc/ghc/wikis/">
         GHC Developers Home</A></P></LI>
     </UL>
   </BODY>

libraries/ghci/ghci.cabal.in

@@ -7,7 +7,7 @@ license:        BSD3
 license-file:   LICENSE
 category:       GHC
 maintainer:     ghc-devs@haskell.org
-bug-reports:    https://ghc.haskell.org/trac/ghc/newticket
+bug-reports:    https://gitlab.haskell.org/ghc/ghc/issues/new
 synopsis:       The library supporting GHC's interactive interpreter
 description:
             This library offers interfaces which mediate interactions between the

utils/deriveConstants/Main.hs

@@ -702,7 +702,7 @@ getWanted verbose os tmpdir gccProgram gccFlags nmProgram mobjdumpProgram
          case Map.lookup "CONTROL_GROUP_CONST_291" m of
              Just 292   -> return () -- OK
              Nothing    -> die "CONTROL_GROUP_CONST_291 missing!"
-             Just 0x292 -> die $ "broken 'nm' detected, see https://ghc.haskell.org/ticket/11744.\n"
+             Just 0x292 -> die $ "broken 'nm' detected, see https://gitlab.haskell.org/ghc/ghc/issues/11744.\n"
                               ++ "\n"
                               ++ "Workaround: You may want to pass\n"
                               ++ "    --with-nm=$(xcrun --find nm-classic)\n"