Support type triggers (#96)

* implement mirrorlist package generator

* implement keyring package generator

* docs update

* do not skip empty lines

* fill remote source for local packages

* faq update

package/share/ahriman/settings/ahriman.ini

@@ -25,6 +25,7 @@ ignore_packages =
 makechrootpkg_flags =
 makepkg_flags = --nocolor --ignorearch
 triggers = ahriman.core.gitremote.RemotePullTrigger ahriman.core.report.ReportTrigger ahriman.core.upload.UploadTrigger ahriman.core.gitremote.RemotePushTrigger
+triggers_known = ahriman.core.support.KeyringTrigger ahriman.core.support.MirrorlistTrigger
 vcs_allowed_age = 604800
 
 [repository]
@@ -34,6 +35,12 @@ root = /var/lib/ahriman
 [sign]
 target =
 
+[keyring]
+target =
+
+[mirrorlist]
+target =
+
 [remote-pull]
 target =