uid_t and gid_t are unsigned. While initializing them to -1 and later
checking against -1 to see if they are still at their default usually
works, introduce two new flags and stop the inband signalling.
Approved by: ed (co-mentor)
remove all the code which was trying to do so.
This code was nasty in several ways, it was hiding
the kernel bug where the kernel was unable to properly
load a module, and it was quitting if it wasn't able
to load the module. The consequence is that an ABI
breakage of the vfsconf API would have broken *every*
mount utility.
