Update versions of *::Packer to get rid of regexp variables that slow down all regexen. Fixes bug #11704.

docs/changelog/7.x.x.txt

@@ -3,6 +3,7 @@
  - fixed: Permission on who can create a shortcut of an Asset.
  - fixed #12032: deleting forum posts
  - fixed: Underground label style forces radio buttons and check boxes to render vertically.
+ - fixed #11704: JavaScript::Packer, HTML::Packer, and CSS::Packer use $& variable
 
 7.10.8
  - rfe #12016 for the top story as well

docs/gotcha.txt

@@ -12,6 +12,10 @@ save you many hours of grief.
     * WebGUI now depends on Data::ICal for making and reading iCal feeds
       for the Calendar.
 
+    * WebGUI now depends on updated versions of the HTML::Packer, JavaScript::Packer and
+      CSS::Packer modules.  These new versions have much better performance than their
+      earlier incarnations.
+
 7.10.4
 --------------------------------------------------------------------
     * WebGUI now depends on Monkey::Patch for doing sanely scoped