Bug 456014: enable mathml in thunderbird. r=philor

mail/confvars.sh

@@ -39,7 +39,6 @@
 MOZ_APP_NAME=thunderbird
 MOZ_UPDATER=1
 MOZ_THUNDERBIRD=1
-MOZ_MATHML=
 MOZ_NO_ACTIVEX_SUPPORT=1
 MOZ_ACTIVEX_SCRIPTING_SUPPORT=
 MOZ_OJI=

mail/installer/windows/packages-static

@@ -408,13 +408,14 @@ bin\res\html.css
 bin\res\quirk.css
 bin\res\forms.css
 bin\res\viewsource.css
+bin\res\mathml.css
 bin\res\charsetData.properties
 bin\res\charsetalias.properties
 bin\res\langGroups.properties
 bin\res\language.properties
 bin\res\wincharset.properties
 bin\res\entityTables\*
-bin\res\dtd\xhtml11.dtd
+bin\res\dtd\*
 bin\res\arrow.gif
 bin\res\arrowd.gif
 bin\res\broken-image.gif