Client: fix socket connection on Windows XP
Client: fix socket connection on Windows XP

For some reason both setting TCP keepalive on and piping to a socket
immediately after connect() causes problems on XP. These operations
can be safely moved to the 'connect' event, which solves the problem
on XP.

mscdex/ssh2,mcanthony/ssh2,24hr/ssh2,jskirst/sftp-to-http,Drooids/ssh2,mscdex/ssh2,ArielAbreu/ssh2,jskirst/sftp-to-http,ianscrivener/ssh2,mcanthony/ssh2,ianscrivener/ssh2,24hr/ssh2,Drooids/ssh2,Student007/ssh2,ArielAbreu/ssh2,mscdex/ssh2,Student007/ssh2,mscdex/ssh2