gentoo-overlay/app-admin/syslog-ng/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer>
	<email>mr_bones_@gentoo.org</email>
	<name>Michael Sterrett</name>
</maintainer>
<use>
	<flag name='smtp'>Enable support for SMTP destinations</flag>
	<flag name='spoof-source'>Enable support for spoofed source addresses</flag>
	<flag name='sql'>Enable support for SQL destinations</flag>
	<flag name='json'>Enable support for JSON template formatting via <pkg>dev-libs/json-glib</pkg></flag>
	<flag name='mongodb'>Enable support for mongodb destinations</flag>
</use>
</pkgmetadata>