OpenSSH for Windows requires paths in the format of /C:/
instead of the pseudo-POSIX paths /cygdrive/c/ or just /c/
Reviewed-by: Daniel Stenberg
Closes#5298
The purpose with this variable is to provide a port number that is
reasonably likely to not have a listener on the local host so that tests
can try connect failures against it. It uses port 47 - "reserved"
according to IANA.
Updated six tests to use it instead of the previous different ports.
Assisted-by: Emil Engler
Closes#5270