Sync with 2.13.6

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/2.10.5.txt

@@ -0,0 +1,17 @@
+Git v2.10.5 Release Notes
+=========================
+
+Fixes since v2.10.4
+-------------------
+
+ * "git cvsserver" no longer is invoked by "git daemon" by default,
+   as it is old and largely unmaintained.
+
+ * Various Perl scripts did not use safe_pipe_capture() instead of
+   backticks, leaving them susceptible to end-user input.  They have
+   been corrected.
+
+Credits go to joernchen <joernchen@phenoelit.de> for finding the
+unsafe constructs in "git cvsserver", and to Jeff King at GitHub for
+finding and fixing instances of the same issue in other scripts.
+

Documentation/RelNotes/2.11.4.txt

@@ -0,0 +1,17 @@
+Git v2.11.4 Release Notes
+=========================
+
+Fixes since v2.11.3
+-------------------
+
+ * "git cvsserver" no longer is invoked by "git daemon" by default,
+   as it is old and largely unmaintained.
+
+ * Various Perl scripts did not use safe_pipe_capture() instead of
+   backticks, leaving them susceptible to end-user input.  They have
+   been corrected.
+
+Credits go to joernchen <joernchen@phenoelit.de> for finding the
+unsafe constructs in "git cvsserver", and to Jeff King at GitHub for
+finding and fixing instances of the same issue in other scripts.
+

Documentation/RelNotes/2.12.5.txt

@@ -0,0 +1,17 @@
+Git v2.12.5 Release Notes
+=========================
+
+Fixes since v2.12.4
+-------------------
+
+ * "git cvsserver" no longer is invoked by "git daemon" by default,
+   as it is old and largely unmaintained.
+
+ * Various Perl scripts did not use safe_pipe_capture() instead of
+   backticks, leaving them susceptible to end-user input.  They have
+   been corrected.
+
+Credits go to joernchen <joernchen@phenoelit.de> for finding the
+unsafe constructs in "git cvsserver", and to Jeff King at GitHub for
+finding and fixing instances of the same issue in other scripts.
+

Documentation/RelNotes/2.13.6.txt

@@ -0,0 +1,17 @@
+Git v2.13.6 Release Notes
+=========================
+
+Fixes since v2.13.5
+-------------------
+
+ * "git cvsserver" no longer is invoked by "git daemon" by default,
+   as it is old and largely unmaintained.
+
+ * Various Perl scripts did not use safe_pipe_capture() instead of
+   backticks, leaving them susceptible to end-user input.  They have
+   been corrected.
+
+Credits go to joernchen <joernchen@phenoelit.de> for finding the
+unsafe constructs in "git cvsserver", and to Jeff King at GitHub for
+finding and fixing instances of the same issue in other scripts.
+

Documentation/git-shell.txt

@@ -79,6 +79,22 @@ EOF
 $ chmod +x $HOME/git-shell-commands/no-interactive-login
 ----------------
 
+To enable git-cvsserver access (which should generally have the
+`no-interactive-login` example above as a prerequisite, as creating
+the git-shell-commands directory allows interactive logins):
+
+----------------
+$ cat >$HOME/git-shell-commands/cvs <<\EOF
+if ! test $# = 1 && test "$1" = "server"
+then
+	echo >&2 "git-cvsserver only handles \"server\""
+	exit 1
+fi
+exec git cvsserver server
+EOF
+$ chmod +x $HOME/git-shell-commands/cvs
+----------------
+
 SEE ALSO
 --------
 ssh(1),