net-proxy/mitmproxy: Update metadata.xml

Add myself and the proxy-maintainer project as maintainers, and also
add a description and the GitHub upstream.

Package-Manager: Portage-3.0.4, Repoman-3.0.1
Signed-off-by: Matt Smith <matt@offtopica.uk>
Signed-off-by: Sam James <sam@gentoo.org>

net-proxy/mitmproxy/metadata.xml

@@ -1,8 +1,28 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
-	<!-- maintainer-needed -->
+	<maintainer type="person">
+		<email>matt@offtopica.uk</email>
+		<name>Matt Smith</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>proxy-maint@gentoo.org</email>
+		<name>Proxy Maintainers</name>
+	</maintainer>
+	<longdescription lang="en">
+		mitmproxy is your swiss-army knife for debugging,
+		testing, privacy measurements, and penetration
+		testing. It can be used to intercept, inspect, modify
+		and replay web traffic such as HTTP/1, HTTP/2,
+		WebSockets, or any other SSL/TLS-protected
+		protocols. You can prettify and decode a variety of
+		message types ranging from HTML to Protobuf, intercept
+		specific messages on-the-fly, modify them before they
+		reach their destination, and replay them to a client
+		or server later on.
+	</longdescription>
 	<upstream>
+		<remote-id type="github">mitmproxy/mitmproxy</remote-id>
 		<remote-id type="pypi">mitmproxy</remote-id>
 	</upstream>
 </pkgmetadata>