cp: add support for --parents and long option synonyms of short opts

By Ian Wienand (ianw AT vmware.com)

function                                             old     new   delta
cp_main                                              257     369    +112
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(add/remove: 0/0 grow/shrink: 1/0 up/down: 112/0)             Total: 112 bytes
   text    data     bss     dec     hex filename
 823000     458    6948  830406   cabc6 busybox_old
 823283     458    6948  830689   cace1 busybox_unstripped

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