Ordered with keysort:
    /abc
    /abc/1/2/a/b/c
    /abc/2
    /abc/22
    /abc/3
    /abc/def/1/2/a/b/c
    /abc!def/1/2/a/b/c
    /abc-def/1/2/a/b
    /abcdef/1/2/a/b/c
    /usr/a
Ordered with natkeysort:
    /abc
    /abc/1/2/a/b/c
    /abc/2
    /abc/3
    /abc/22
    /abc-def/1/2/a/b
    /abc/def/1/2/a/b/c
    /abc!def/1/2/a/b/c
    /abcdef/1/2/a/b/c
    /usr/a