feature addition to openssh_client: Specification of source port

[Tanmay Tiwari]

Hello

*Feature*: Specification of local port when initiating a ssh connection
using ssh client (and optionally specification of local address/interface)

Many people approach me for patching their openssh installation to allow
specification of source port when using ssh client. Mostly the reason is
they are using a source port based firewall.

I think it would be good to have the feature in the main branch of openssh.
Specifying local port is a rather basic feature for a network related
application.

I am willing to work on the feature (Its a 50 line patch anyway).

What are the reasons it hasn't been added yet? And should it be added to
master?