Log Message:
Updte lsh to 2.0.4.
While here,
 * set LICENSE=gnu-gpl-v2
 * marked as user-destdir installation ready
 * switch to use system argp
 * add missing zlib buildlink

News for the 2.0.4 release

	Fixed x11 forwarding bug in the lsh client.

News for the 2.0.3 release

	At startup, lshd now tries to close any spurious open file
	descriptors. New test case for lshd fd leakage.

	lshd --daemonic --no-syslog now sets up a proper daemonic
	environment, except that log messages are still sent to
	stderr. Improved testing of this feature.