changed file lock types specified in rio_read() to F_RDLCK and F_UNLCK
set up basic skeleton for link_state_exchange_server(); only needs error conditions specific to the link-state exchange.
set up basic skeleton for link_state_exchange_server(); only needs error conditions specific to the link-state exchange.
send link-state packet in link_state_exchange_server()
Merge branch 'master' of https://github.com/DCPagan/Proxy_part2