*: add/remove safe_, it seems we had a few incorrect uses

*: add/remove safe_, it seems we had a few incorrect uses

function                                             old     new   delta
chat_main                                           1359    1361      +2
microcom_main                                        712     713      +1
ifplugd_main                                        1109    1110      +1
arpping                                              465     466      +1
acpid_main                                           440     441      +1
script_main                                         1069    1067      -2
cgi_io_loop_and_exit                                 594     591      -3
telnet_main                                         1475    1469      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/3 up/down: 6/-11)              Total: -5 bytes

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