configurable authenticator

[Markus Friedl]

On Tue, Apr 10, 2001 at 10:53:27AM -0300, Don Graves wrote:
> ExternalAuthenticator /usr/local/bin/ext_auth

this is what BSD_AUTH does:

	/usr/libexec/auth/login_activ
	/usr/libexec/auth/login_chpass
	/usr/libexec/auth/login_crypto
	/usr/libexec/auth/login_kerberos
	/usr/libexec/auth/login_krb-or-pwd
	/usr/libexec/auth/login_lchpass
	/usr/libexec/auth/login_passwd
	/usr/libexec/auth/login_reject
	/usr/libexec/auth/login_skey
	/usr/libexec/auth/login_snk
	/usr/libexec/auth/login_token

openssh already supports the bsd-auth API,
so porting this api to other systems would help.

-m