adds correct error reporting to async connect()s
fixes the server-discards-data-before-connected-bug found by
onoe@sm.sony.co.jp
+ - mouring@cvs.openbsd.org 2001/05/08 19:45:25
+ [misc.c misc.h scp.c sftp.c]
+ Use addargs() in sftp plus some clean up of addargs(). OK Markus
20010508
- (bal) Fixed configure test for USE_SIA.