release.sh: can we specify the user in the script?

[benlk]

Right now, we have to go through this user-switching rigmarole:

Writing to release/svn/trunk
Committing release/svn/trunk (slow) ...
Authentication realm: <https://plugins.svn.wordpress.org:443> Use your WordPress.org login
Password for 'user': 

Authentication realm: <https://plugins.svn.wordpress.org:443> Use your WordPress.org login
Username: innlabs
Password for 'innlabs':

In that log, user is the current computer user, which SVN assumes is the default SVN user on the remote host. It would be easier if we could specify in release.sh what the user name is.

Can we specify that user name?