Get rid of psock.h (bad idea); Add logic to clone the socket structure when...

Get rid of psock.h (bad idea); Add logic to clone the socket structure when wrapping the telnet connection as a character driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4349 42af7a65-404d-4744-a932-0658087f49c3