affs: use ->kill_sb() to simplify ->put_super() and failure exits of ->mount()
affs: use ->kill_sb() to simplify ->put_super() and failure exits of ->mount()

... and return saner errors from ->mount(), while we are at it

Signed-off-by: Al Viro <de609eb4d5d70b1d38ec6642adbfc33a2781f63c@zeniv.linux.org.uk>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs