Merge branch 'jk/daemon-path-ok-check-truncation' into maint

Merge branch 'jk/daemon-path-ok-check-truncation' into maint

"git daemon" used fixed-length buffers to turn URL to the
repository the client asked for into the server side directory
path, using snprintf() to avoid overflowing these buffers, but
allowed possibly truncated paths to the directory.  This has been
tightened to reject such a request that causes overlong path to be
required to serve.

* jk/daemon-path-ok-check-truncation:
  daemon: detect and reject too-long paths