Merge branch 'patch-20190113c' into 'dev'

Hooks to allow addons to add "extras" to privacy group settings edit page.

See merge request hubzilla/core!1469

doc/hook/privacygroup_extras.bb

@@ -0,0 +1,12 @@
+[h2]privacygroup_extras[/h2]
+
+Add items to the Privacy Group edit form
+
+[code]
+			$hookinfo = [ 'pgrp_extras' => '', 'group'=>$argv(1) ];
+			call_hooks ('privacygroup_extras',$hookinfo);
+			$pgrp_extras = $hookinfo['pgrp_extras'];
+[/code]
+
+see: Zotlabs/Module/Group.php
+see: view/tpl/privacy_groups.tpl

doc/hook/privacygroup_extras_drop.bb

@@ -0,0 +1,11 @@
+[h2]privacygroup_extras_drop[/h2]
+
+Called after privacy group is dropped
+
+[code]
+			$hookinfo = [ 'pgrp_extras' => '', 'group'=>$argv(2) ];
+			call_hooks ('privacygroup_extras_drop',$hookinfo);
+[/code]
+
+see: Zotlabs/Module/Group.php
+see: view/tpl/privacy_groups.tpl

doc/hook/privacygroup_extras_post.bb

@@ -0,0 +1,11 @@
+[h2]privacygroup_extras_post[/h2]
+
+Called as privacy group edit form is edited.
+
+[code]
+			$hookinfo = [ 'pgrp_extras' => '', 'group'=>$group['id'] ];
+			call_hooks ('privacygroup_extras_post',$hookinfo);
+[/code]
+
+see: Zotlabs/Module/Group.php
+see: view/tpl/privacy_groups.tpl