coccicheck: refer to Documentation/coccinelle.txt and wiki

Refer to the Documentation/coccinelle.txt and supplemental documentation
on the wiki:

https://bottest.wiki.kernel.org/coccicheck

This page shall always refer to the linux-next iteration of scripts/coccicheck.

v4: only refer to the wiki as supplemental documentation, and also
    update Documentation/coccinelle.txt.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>

Documentation/coccinelle.txt

@@ -38,6 +38,15 @@ as a regular user, and install it with
 
         sudo make install
 
+ Supplemental documentation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For supplemental documentation refer to the wiki:
+
+https://bottest.wiki.kernel.org/coccicheck
+
+The wiki documentation always refers to the linux-next version of the script.
+
  Using Coccinelle on the Linux kernel
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

scripts/coccicheck

@@ -1,9 +1,10 @@
 #!/bin/bash
-
+# Linux kernel coccicheck
+#
+# Read Documentation/coccinelle.txt
 #
 # This script requires at least spatch
 # version 1.0.0-rc11.
-#
 
 DIR="$(dirname $(readlink -f $0))/.."
 SPATCH="`which ${SPATCH:=spatch}`"