udhcpd: check config file for bad IP ranges (start > end)

function                                             old     new   delta
.rodata                                           104209  104238     +29
read_config                                          208     225     +17
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 46/0)               Total: 46 bytes

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