squashfs: xattr simplifications
squashfs: xattr simplifications

Now that the xattr handler is passed to the xattr handler operations, we
have access to the attribute name prefix, so simplify the squashfs xattr
handlers a bit.

Signed-off-by: Andreas Gruenbacher <aa72c01072d4bf2072d18f225c78c2a045835d6e@redhat.com>
Cc: Phillip Lougher <21542e38a0b82113edef7e33c378f247e235fb75@squashfs.org.uk>
Signed-off-by: Al Viro <de609eb4d5d70b1d38ec6642adbfc33a2781f63c@zeniv.linux.org.uk>

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