regsvr32: Add Unicode support (version 8)

[Hugh McMaster]

Changelog: Convert programs/regsvr32/regsvr32.c to Unicode.

This version makes use of a modified resource string (in the regsvr32.rc file).
The wine.pot template has been updated accordingly, as the updated resource string fuzzies existing translations.

Also, all non-relevant changes have been removed from this version. 		 	   		  
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