Grey out "strike through" text

TODO

@@ -3,10 +3,9 @@ MAYBE:
   - Separate syntax group for heading delimiters
   - Syntax highlight and indent properties
   - Hightlight concealed TeX the same as normal text
-  - TeX math fragments in bold, italic, etc. text
   - Close inline block using same number of starting delimiters.
-  - Grey out strikethrough text.
   - Try to get text attributes to stack (e.g. underlined text in bold text)
+    - TeX math fragments in bold, italic, etc. text
   - Set a max number of lines to search for end delimiter for bold/italic/etc. to 3 (might not be possible)
 
 UNLIKELY:

syntax/org.vim

@@ -34,6 +34,8 @@ highlight def orgUnderline term=underline cterm=underline gui=underline
 highlight def link orgBoldDelimiter      orgBold
 highlight def link orgUnderlineDelimiter orgUnderline
 
+highlight def link orgStrikethrough Ignore
+highlight def link orgStrikethroughDelimiter orgStrikethrough
 
 " Options
 syntax match  orgOption /^\s*#+\w\+.*$/ keepend