This block is optional, although it is highly recommended. The variables are:
LICENSE_GROUPS
	  or
	  LICENSE_GROUPS_NAME
LICENSE_NAME
	  or
	  LICENSE_NAME_NAME
LICENSE_TEXT
	  or
	  LICENSE_TEXT_NAME
LICENSE_FILE
	  or
	  LICENSE_FILE_NAME
LICENSE_PERMS
	  or
	  LICENSE_PERMS_NAME
LICENSE_DISTFILES
	  or
	  LICENSE_DISTFILES_NAME
If there are multiple licenses, sort the different
      LICENSE_VAR_NAME
      variables by license name.
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    documentation may be
    sent to <freebsd-questions@FreeBSD.org>.
    Send questions about this document to <freebsd-doc@FreeBSD.org>.