ext.h: fix spelling and grammar in a comment

fix sign-compare issues

Move to 2 clause license, approved by Wolfgang Solfrank.

Kill __P(), ANSIfy, remove main() prototype.

Spell 'occurred' with two 'r's.

Various typos in comments (neccessary, sceme, choise, ...).

Make WARNS=2 safe, and set WARNS to 2.

Format string cleanups by Bill Sommerfeld.

Recognize "dirty" signature on FAT as set by Windows 95 OSR2+ and don't report
it just as "odd byte sequence". Handle the dirty flag similar way
it's treated on e.g. FFS - e.g. clear it separately fr

Recognize "dirty" signature on FAT as set by Windows 95 OSR2+ and don't report
it just as "odd byte sequence". Handle the dirty flag similar way
it's treated on e.g. FFS - e.g. clear it separately from rest of FAT.
Changing of FAT is now postponed until after all checks are done,
check.c:checkfilesys() was cleaned considerably and several messages
has been adjusted to be more accurate.

If file system was modified and no error has occured, just return 0
instead of 4 - there is no need for forcing a reboot in this case.

This addresses bin/5638 by Christos Zoulas.

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Add support for FAT32
Support dropping lost cluster chains (on request by Christoph Badura)
While being here, fix some minor bugs, mostly with format strings

- use error printing code from fsck(8)
- remove fstab walking code
- add missing prototypes
- add missing argument in dir.c near "Truncate", where delete() was being
called with fewer args. I think

- use error printing code from fsck(8)
- remove fstab walking code
- add missing prototypes
- add missing argument in dir.c near "Truncate", where delete() was being
called with fewer args. I think the missing argument should be a zero,
but Wolfgang should check...

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Don't allocate data structures for non-directories
Free any data structures when finishing a check (at the latest)

Check return values of malloc
Generate full pathnames only on request
Minor cleanup, RCS Ids in .h files

Add fsck utility for msdosfs