Usage typo - Manual routing

What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?
mismatch in manual routing flags: mc-rx-if <--> rx_mc_if 

What version of the product are you using? On what operating system?

Please provide any additional information below.

Usage: sockperf server [options] [args]...
 sockperf server                          
 sockperf server [-i ip] [-p port] [--rx_mc_if ip] [--tx_mc_if ip]    same as udp_lat
 sockperf server -f file [-F s/p/e] [--rx_mc_if ip] [--tx_mc_if ip]

Options:
 -h,-?   --help,--usage         -Show the help message and exit.
         --tcp                  -Use TCP protocol (default UDP).
 -i      --ip                   -Listen on/send to ip <ip>.     
 -p      --port                 -Listen on/connect to port <port> (default 11111).
 -f      --file                 -Tread multiple ip+port combinations from file <file> (server uses select).
 -F      --iomux-type           -Type of multiple file descriptors handle [s|select|p|poll|e|epoll](default select).
         --timeout              -Set select/poll/epoll timeout to <msec>, -1 for infinite (default is 10 msec).     
 -a      --activity             -Measure activity by printing a '.' for the last <N> packets processed.             
 -A      --Activity             -Measure activity by printing the duration for last <N> packets processed.          
         --tcp-avoid-nodelay    -tcp-nodelay uses for delivering TCP Messages Immediately (default ON).             
         --mc-rx-if             -<ip> address of interface on which to receive mulitcast packets (can be other then route table).
         --mc-tx-if             -<ip> address of interface on which to transmit mulitcast packets (can be other then route table).
         --mc-loopback-enable   -Enables mc loopback (default disabled).                                                          
         --mc-ttl               -Limit the lifetime of the packet (default 2).
Original issue reported on code.google.com by men...@gmail.com on 26 May 2011 at 12:26
DD1984 / sockperf

Usage typo - Manual routing #32
