prosodyctl: Add experimental way to reload specific modules directly

Mostly thinking out loud about how various actions may use the shell

This enables the following sequence of commands:

	prosodyctl install mod_example
	prosodyctl reload mod_example

which is simpler than

	prosodyctl shell module reload example

1 files changed, 9 insertions, 0 deletions

diff --git a/prosodyctl b/prosodyctl
index 722e8ff2..d65760ca 100755
--- a/prosodyctl
+++ b/prosodyctl
@@ -565,6 +565,15 @@ function commands.reload(arg)
 		return 0;
 	end
 
+	if arg[1] and arg[1]:match"^mod_" then
+		-- TODO reword the usage text, document
+		local shell = require "prosody.util.prosodyctl.shell";
+		arg[1] = arg[1]:match("^mod_(.*)"); -- strip mod_ prefix
+		table.insert(arg, 1, "module");
+		table.insert(arg, 2, "reload");
+		return shell.shell(arg);
+	end
+
 	service_command_warning("reload");
 
 	if not prosodyctl.isrunning() then