issue #9047 Support @param-taint in PHP (permit dashes in command ali…

…ases?)

The documentation gave the warning:
```
doc/commands.doc:3461: error: Found unknown command '\LaTeX'
```
this was due to the fact that in the code there was:
```
\LaTex-only
```
and this is seen as a potential `ALIASES`

doc/commands.doc

@@ -3458,7 +3458,7 @@ class Receiver
 
   \b Note:
     environment variables (like \$(HOME) ) are resolved inside a
-    \LaTeX-only block.
+    \LaTeX\-only block.
 
   \sa sections \ref cmdrtfonly "\\rtfonly",
                \ref cmdxmlonly "\\xmlonly",