New code for 5.6:
- Get rid of compat_time_t
- Convert time_t to time64_t in quota code
- Remove shadow variables
- Prevent ATTR_ flag misuse in the attrmulti ioctls
- Clean out strlen in the attr code
- Remove some bogus asserts
- Fix various errors with 32-bit kernels
- Pack xfs_dir2_sf_entry_t to fix build errors on arm oabi