pass transport verbosity down to git_connect

pass transport verbosity down to git_connect

While working in connect.c to perform non-blocking connections,
I noticed calling "git fetch -v" was not causing the progress
messages inside git_tcp_connect_sock to be emitted as I
expected.

Looking at history, it seems connect_setup has never been called
with the verbose parameter.  Since transport already has a
"verbose" field, use that field instead of another parameter
in connect_setup.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>