ping: use setitimer() instead of ualarm()

function                                             old     new   delta
sendping_tail                                        218     265     +47
ualarm                                                79       -     -79
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(add/remove: 0/2 grow/shrink: 1/0 up/down: 47/-79)            Total: -32 bytes

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