readlink: support -n, -v, -s and -q too if support for -f is requested

function                                             old     new   delta
readlink_main                                        104     135     +31
packed_usage                                       26322   26321      -1
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(add/remove: 0/0 grow/shrink: 1/1 up/down: 31/-1)              Total: 30 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2 files changed