RelNotes: replace Gmane with real Message-IDs

The only references to Gmane that remain are in RelNotes. Although these
are definitely not in active use, they might be of historical interest
for future readers so let's ensure that mail references are more robust.

Replace links to Gmane with links to lore.kernel.org (which is our new
preferred mailing list archive and has the Message-ID in the URL) and
bare Gmane ID references with Message-IDs.

The Message-IDs were found by searching for "gmane:<id>" on
https://public-inbox.org/git/ and taking the resulting message.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/1.6.2.txt

@@ -11,7 +11,7 @@ push running this release will issue a big warning when the
 configuration variable is missing.  Please refer to:
 
   http://git.or.cz/gitwiki/GitFaq#non-bare
-  http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+  https://lore.kernel.org/git/7vbptlsuyv.fsf@gitster.siamese.dyndns.org/
 
 for more details on the reason why this change is needed and the
 transition plan.

Documentation/RelNotes/1.6.3.txt

@@ -11,7 +11,7 @@ push running this release will issue a big warning when the
 configuration variable is missing.  Please refer to:
 
   http://git.or.cz/gitwiki/GitFaq#non-bare
-  http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+  https://lore.kernel.org/git/7vbptlsuyv.fsf@gitster.siamese.dyndns.org/
 
 for more details on the reason why this change is needed and the
 transition plan.

Documentation/RelNotes/1.6.4.txt

@@ -11,7 +11,7 @@ push running this release will issue a big warning when the
 configuration variable is missing.  Please refer to:
 
   http://git.or.cz/gitwiki/GitFaq#non-bare
-  http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+  https://lore.kernel.org/git/7vbptlsuyv.fsf@gitster.siamese.dyndns.org/
 
 for more details on the reason why this change is needed and the
 transition plan.

Documentation/RelNotes/1.6.5.txt

@@ -22,7 +22,7 @@ push running this release will issue a big warning when the
 configuration variable is missing.  Please refer to:
 
   http://git.or.cz/gitwiki/GitFaq#non-bare
-  http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+  https://lore.kernel.org/git/7vbptlsuyv.fsf@gitster.siamese.dyndns.org/
 
 for more details on the reason why this change is needed and the
 transition plan.

Documentation/RelNotes/1.6.6.txt

@@ -64,7 +64,7 @@ users will fare this time.
    Please refer to:
 
    http://git.or.cz/gitwiki/GitFaq#non-bare
-   http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+   https://lore.kernel.org/git/7vbptlsuyv.fsf@gitster.siamese.dyndns.org/
 
    for more details on the reason why this change is needed and the
    transition process that already took place so far.

Documentation/RelNotes/1.8.4.txt

@@ -58,7 +58,7 @@ Foreign interfaces, subsystems and ports.
    credential helper interface from Git.pm.
 
  * Update build for Cygwin 1.[57].  Torsten Bögershausen reports that
-   this is fine with Cygwin 1.7 ($gmane/225824) so let's try moving it
+   this is fine with Cygwin 1.7 (cf. <51A606A0.5060101@web.de>) so let's try moving it
    ahead.
 
  * The credential helper to talk to keychain on OS X (in contrib/) has

Documentation/RelNotes/2.5.0.txt

@@ -172,7 +172,8 @@ Performance, Internal Implementation, Development Support etc.
    incorrect patch text to "git apply".  Add tests to demonstrate
    this.
 
-   I have a slight suspicion that this may be $gmane/87202 coming back
+   I have a slight suspicion that this may be
+   cf. <7vtzf77wjp.fsf@gitster.siamese.dyndns.org> coming back
    and biting us (I seem to have said "let's run with this and see
    what happens" back then).
 

Documentation/RelNotes/2.8.3.txt

@@ -55,8 +55,8 @@ Fixes since v2.8.2
    This is necessary to use Git on Windows shared directories, and is
    already enabled for the MinGW and plain Windows builds.  It also
    has been used in Cygwin packaged versions of Git for quite a while.
-   See http://thread.gmane.org/gmane.comp.version-control.git/291853
-   and http://thread.gmane.org/gmane.comp.version-control.git/275680.
+   See https://lore.kernel.org/git/20160419091055.GF2345@dinwoodie.org/
+   and https://lore.kernel.org/git/20150811100527.GW14466@dinwoodie.org/.
 
  * "git replace -e" did not honour "core.editor" configuration.
 

Documentation/RelNotes/2.9.0.txt

@@ -368,7 +368,7 @@ notes for details).
    This is necessary to use Git on Windows shared directories, and is
    already enabled for the MinGW and plain Windows builds.  It also
    has been used in Cygwin packaged versions of Git for quite a while.
-   See http://thread.gmane.org/gmane.comp.version-control.git/291853
+   See https://lore.kernel.org/git/20160419091055.GF2345@dinwoodie.org/
 
  * "merge-octopus" strategy did not ensure that the index is clean
    when merge begins.