(I didn't try whether it still works on 4.0. Would be nice if
someone did it.)
-supply an example pam.conf file
-slow down to avoid abuse, better cleanup in error cases, more paranoia
thanks to Joerg for suggestions
(I didn't adopt the libtool change for now because it is not clear for
be whether that PAM modules is useful for non-NetBSD.)
-block SIGCHLD while the forked helper process is running, so that a
calling process with a SIGCHLD handler won't steal the exit status
which is used to report success of the authentication.
This makes the "dropbear" ssh server usable if started with user
privileges.
bump revision to 1.1
