K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2014-10-31T09:19:46.935707Z
K 7
svn:log
V 290
filedesc: iterate over fd table only once in fdcopy

While here add 'fdused_init' which does not perform unnecessary work.

Drop FILEDESC_LOCK_ASSERT from fdisused and rely on callers to hold
it when appropriate. This function is only used with INVARIANTS.

No functional changes intended.

END