Some Bugs in source code

[danleechina]

In the SOCKSProxySocket.m source file, when convert address (such as line 192) to NSString, the parameter length passed to initWithBytesNoCopy:length:encoding:freeWhenDone was wrong. It should use something like strlen(address) not INET_ADDRSTRLEN

[liaogang]

in socksConnect(), need convert the host to ipv4 address , if host is a ip