win32: fix ssh://host:port when using Plink
Moves ssh argument building to platform specific utils code.
The win32 version looks for plink in ssh command string and
uses '-P' in lieu of '-p' for specifying a port
adding foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
pushing to ../2
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files