Fix sasl for DIGEST-MD5, PLAIN, and LOGIN mechanisms, which I don't think ever actually worked properly. Add a sasluser argument if a specific identity is required for the backend, which if unsupplied, tries to guess if a binddn is present. (Uwe's previous commit fixed EXTERNAL and GSSAPI, which did work, but randomly failed due to hash ordering.) Minor style cleanups, remove duplicate/unecessary logic for anonymous binds.

VERSION := $(shell awk '/VERSION =/ { print $$4 }' shelldap | sed -e "s/[';]//g")

release:
	@mkdir shelldap-${VERSION}
	@cp shelldap shelldap-${VERSION}
	@pod2text shelldap > shelldap-${VERSION}/USAGE
	@tar -czvf shelldap-${VERSION}.tar.gz shelldap-${VERSION}
	@rm -rf shelldap-${VERSION}