Add remote following of local profiles.

lib/pleroma/web/templates/twitter_api/util/subscribe.html.eex

@@ -0,0 +1,10 @@
+<%= if @error do %>
+  <h2>Error: <%= @error %></h2>
+<% else %>
+  <h2>Remotely follow <%= @nickname %></h2>
+  <%= form_for @conn, util_path(@conn, :remote_subscribe), [as: "user"], fn f -> %>
+  <%= hidden_input f, :nickname, value: @nickname %>
+  <%= text_input f, :profile, placeholder: "Your account ID, e.g. lain@quitter.se" %>
+  <%= submit "Follow" %>
+  <% end %>
+<% end %>