Make command client and server use iw_ip functions. Added
SO_REUSEADDR to iw_ip_open_server_socket().
Change iw files to use iw_ip.c, added more ip utilities, added
client logging to simple example.
Fixed bugs with IP address test suite. Fixed issues with client specific
logging for simple example.
Corrected a 64-bit compile error, added more IP address tests,
fixed a problem when converting an address to a string with an
optional port number.
Fixed access of threads on 64-bit machine.
Added ability to convert string to port number. Fixed issues with
displaying the log levels in the program usage help.