[Patch] Encode invalid chars in /proc/registry entries (merge from 1.5)

[Christian Franke]

This is a 1.5->1.7 merge of my patch from 
http://sourceware.org/ml/cygwin-patches/2007-q4/msg00017.html

Christian


2008-12-01  Christian Franke  <franke@computer.org>

	* fhandler_registry.cc (must_encode): New function.
	(encode_regname): Ditto.
	(decode_regname): Ditto.
	(fhandler_registry::exists): Encode name before path compare.
	(fhandler_registry::fstat): Pass decoded name to win32 registry call.
	(fhandler_registry::readdir): Return encoded name to user.
	(fhandler_registry::open): Store decoded name into value_name.
	(open_key): Pass decoded name to win32 registry call


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