Update license and copyright text to conform to LBNL standards.

Note that the license remains a 3-clause BSD license; the only
license changes were to add the name of the program and to add
some punctuation.

(cherry picked from commit da9f046f19409cb2f1bf1505943502cb51afc035)
Signed-off-by: Bruce A. Mah <bmah@es.net>

Conflicts:
	src/iperf_api.h
	src/iperf_error.c
	src/iperf_sctp.c
	src/iperf_sctp.h
	src/iperf_udp.c
	src/iperf_util.c
	src/iperf_util.h
	src/net.c
	src/net.h
Regen.