kern/122047: [ext2fs] incorrect handling of UF_IMMUTABLE / UF_APPEND, flag on EXT2FS (maybe others)

[Kirk McKusick]

Bruce,

I concur with your analysis of what should be done here. Disallow
manipulation of UF_ flags in ext2 and restrict SF_ flags to appropriate
priviledge as is done in both FreeBSD and Linux. The only debate is
whether to enforce FreeBSD securelevel for ext2 which I would be
inclined to do.

	Kirk McKusick