docs/manual/resources.txt: add link to lore.kernel.org

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 8e789e96bb869b7b1e3e54a262399848214c6313)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/manual/resources.txt

@@ -21,11 +21,9 @@ http://lists.buildroot.org/mailman/listinfo/buildroot[mailing list info
 page].
 +
 Mails that are sent to the mailing list are also available in the
-http://lists.buildroot.org/pipermail/buildroot[mailing list archives] and
-via http://gmane.org[Gmane], at
-http://dir.gmane.org/gmane.comp.lib.uclibc.buildroot[+gmane.comp.lib.uclibc.buildroot+].
-Please search the mailing list archives before asking questions, since
-there is a good chance someone else has asked the same question before.
+mailing list archives, available through
+http://lists.buildroot.org/pipermail/buildroot[Mailman] or at
+https://lore.kernel.org/buildroot/[lore.kernel.org].
 
 IRC::
 +