Fix a problem where malformed HTTP headers are sent to a bkd.  This matters if a http proxy is in the middle looking at the request.
Fix a problem where malformed HTTP headers are sent to a bkd.  This matters
if a http proxy is in the middle looking at the request.

This fixes a problem with WinProxy.

bk: 3c4dc883-LC1qaUu2BeMrBs9KB_Xkw
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper