Fix ips_out_nosa errors accounting.

MFC after:	1 week
Sponsored by:	Yandex LLC
Decode more fields when dumping USB descriptors.
- Some minor style changes while at it.

Submitted by:	Dmitry Luhtionov <dmitryluhtionov@gmail.com>
MFC after:	1 week
Fix spelling and wording.
ifdef ext2_print_inode which is not really used.

ext2_print_inode is not really used but it was nice to
have for initial development work. #ifdef it under a
new EXT2FS_DEBUG knob so that we don't spend time
compiling it.

MFC after:	3 days