test-inotify: test symlink indirection for unix sockets
The inotify code performs a delicate dance to work around the 108-byte
limit on unix domain socket path names on Linux.
This change sets us up to safely refactor that code without breaking
it. (It is redundant with part of test-inotify-issue1208.t, but we will
shortly make that test go away.)
$ hg init
$ echo 123 > a
$ hg add a
$ hg commit -m "first" a
$ mkdir sub
$ echo 321 > sub/b
$ hg add sub/b
$ hg commit -m "second" sub/b
$ cat sub/b
321
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ cat sub/b 2>/dev/null || echo "sub/b not present"
sub/b not present
$ test -d sub || echo "sub not present"
sub not present