Stamp HEAD as 9.4devel.

Let the hacking begin ...

src/tools/git_changelog

@@ -38,7 +38,7 @@ require IPC::Open2;
 # (We could get this from "git branches", but not worth the trouble.)
 # NB: master must be first!
 my @BRANCHES = qw(master
-  REL9_2_STABLE REL9_1_STABLE REL9_0_STABLE
+  REL9_3_STABLE REL9_2_STABLE REL9_1_STABLE REL9_0_STABLE
   REL8_4_STABLE REL8_3_STABLE REL8_2_STABLE REL8_1_STABLE REL8_0_STABLE
   REL7_4_STABLE REL7_3_STABLE REL7_2_STABLE REL7_1_STABLE REL7_0_PATCHES
   REL6_5_PATCHES REL6_4);

src/tools/version_stamp.pl

@@ -23,7 +23,7 @@
 # Major version is hard-wired into the script.  We update it when we branch
 # a new development version.
 $major1 = 9;
-$major2 = 3;
+$major2 = 4;
 
 # Validate argument and compute derived variables
 $minor = shift;