Fix Pangya Fantasy golf properly, add some sceNet* stubs, fix some typos

The main commit I'd like to see added is the Pangya fix, since it's a better implementation: rather than just always return NOCWD, set an error code variable so sceIoOpen can know to return the proper error: either NOCWD or FILE_NOT_FOUND.

The sceNet stubs were an attempt to shut up Peace Walker and other games a bit in the logging. Eheh.