add an item about creating branches when necessary



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4579 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/docs/internals/release-HOWTO.txt b/docs/internals/release-HOWTO.txt
index e9a2cc8..3f1d145 100644
--- a/docs/internals/release-HOWTO.txt
+++ b/docs/internals/release-HOWTO.txt
@@ -87,7 +87,9 @@
 - Check tarball builds, installs, regtests on platforms of interest.
   If not, fix and repeat until success.
 
-- Tag the repository ("VALGRIND_X_Y_Z").
+- Tag the repositories ("VALGRIND_X_Y_Z" and "VEX_X_Y_Z").
+  If it's a X.Y.0 release, make "VALGRIND_X_Y_BRANCH" and "VEX_X_Y_BRANCH"
+  branches too.
   
 - Update website: 
   - Put the tarball up.