reg.exe: Add query function

[Hugh McMaster]

This patch builds significantly on the query function stub in programs/reg.exe. The patch includes recursion for subkeys.

Some examples of usage:

wine reg.exe query "HKCU"
wine reg.exe query "HKCU\Console"
wine reg.exe query "HKCU\Console" /v "ScreenSize"
wine reg.exe query "HKCU\Software" /s

---
 programs/reg/reg.c |  232 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 221 insertions(+), 11 deletions(-)


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