security/suricata: Remove unsupported DAG (Endace Capture) OPTION
This OPTION is non-functional as it requires hardware support and libdag from
Endace, which is not available in, nor recommended to be built via the ports
This OPTION also incorrectly added CONFIGURE_ARGS without adding any
LIB_DEPENDS, which broke configure: during build when the option was enabled.
Reported by: mat (via pkg-fallout, via IRC)