* highlighter: Fix region & pattern detection
* syntax/sh: Highlight upper case options too
* syntax/c(pp): Try to synchronize the rules to lower the maintenance effort
* syntax/ruby: Fix explicit filename detection in directories
* highlighter: Respect skip rules in regions
* syntax/sh: Fix parameter expansion, cond. flags and generalize filename via ""
* syntax/php|vi: Correct strings in comments to comments only
Additionally improve vimscript comment handling.
* highlighter: Remove problematic start|end check in find(all)Index()
...and additionally remove recursive region end detection
There is a bit of mess in the usage of HighlightMatches: in some places
we assume that it updates lines from startline to endline inclusive,
in other places we assume it's non-inclusive.
This fix makes it always inclusive.
In particular, it fixes a bug: when we open a file which has no
newline at the end, the last line isn't highlighted.
