update socket_server.c, fix Address already in use bug, setsockopt must p...

Guo Wenxue

2018-10-24 357fe7ceed7c2cf00cbe1b26e19cd2b9fde51aab

tools/rpi_crosstool.tar.bz2 does not exist in tree 0340f2c3c069486c43bc48c75c56d5c24d339a04