fts: fix file descriptor leak in fts_closeHEADmain

fts_build() stores a dup'd file descriptor in each directory
entry's fts_dirfd.  When a traversal is abandoned before
completion and fts_close() is called, the cleanup loop freed
each pending entry with free() without first closing its
fts_dirfd, leaking one descriptor per pending directory.

Close fts_dirfd before freeing each entry in the cleanup loop,
matching the handling already applied to the dummy parent entry
after the loop.

Add a regression test that descends a couple of levels, abandons
the traversal, closes, and asserts the open descriptor count is
unchanged.

PR:             297557
Reported by:    asomers
Fixes:          4bd01d6ae016
Sponsored by:   Google LLC (GSoC 2026)
Reviewed by:	asomers
Pull Request:	https://github.com/freebsd/freebsd-src/pull/2373

0 files changed, 0 insertions, 0 deletions