nsis: Change plugins to use Unicode.
* src/gpg4win-src.nsi: Add Unicode statement. * src/gpg4win.nsi: Ditto. * src/exdll.c (getuservariable,setuservariable): Fix addressing. * src/g4wihelp.c (dummy): Extra debug code.
The fixes were first tested in gnupg master.
- GnuPG-bug-id: T6448