+SHELL.
* Turn PKG_REGISTER_SHELLS into a variable that can be set in the shell
environment so that admins can make a choice when installing from
binary packages.
* PKG_SHELL is now a list of paths, and if the path is relative, then it
is taken to be relative to ${PREFIX}. Convert packages that set
PKG_SHELL to take advantage of this new feature by changing the full
paths to the shells into relative paths.
Based on rssh package in pkgsrc-wip by pancake at phreaker dot net,
slightly modified and updated to latest version by myself.
Claim stewardship.
Rssh is a restricted shell for use with OpenSSH, allowing only scp
and/or sftp. For example, if you have a server which you only want
to allow users to copy files off of via scp, without providing
shell access, you can use rssh to do that.
