COMMIT_NOTES: notice to check for soversion bumps

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/COMMIT_NOTES b/COMMIT_NOTES
index 7583fac..592808c 100644
--- a/COMMIT_NOTES
+++ b/COMMIT_NOTES
@@ -11,5 +11,9 @@
 
 - If you touch any parts of libxtables (xtables.c, include/xtables.h.in),
   make sure the so-version is updated _appropriately_ (i.e. read the
-  libtool manual about Versioning:: first if need be) in configure.ac.
+  libtool manual about Versioning:: first, if need be) in configure.ac.
   Adding fields to a struct always entails a vcurrent bump.
+
+  - Check, whether a bump (vcurrent,vage) has already been made since the
+    last release (no more than one per release), e.g.:
+            git log v1.4.4.. configure.ac