Add alias support for both control and control-url options in cli

- puma#1416 introduced a bug in pumactl
  the puma cli does not respond to `control-cli` option. On puma it is called `control`
- this commit puma@a8f54f7
  was correct, but it looked like a typo since the names of the options are not consistent across versions
- the best option for fixing this seems to be to support both options in the cli
- we don't want to stop supporting `control` in the cli for backwards-compatibility

- should pumactl be extended to support `control`? we don't need to worry about
  backwards compatibility for this one, but it could cause some confusion

-[] test

lib/puma/cli.rb

@@ -83,6 +83,14 @@ def unsupported(str)
       raise UnsupportedOption
     end
 
+    def configure_control_url(command_line_arg)
+      if command_line_arg
+        @control_url = command_line_arg
+      elsif Puma.jruby?
+        unsupported "No default url available on JRuby"
+      end
+    end
+
     # Build the OptionParser object to handle the available options.
     #
 
@@ -97,13 +105,15 @@ def setup_options
             file_config.load arg
           end
 
-          o.on "--control URL", "The bind url to use for the control server",
-            "Use 'auto' to use temp unix server" do |arg|
-            if arg
-              @control_url = arg
-            elsif Puma.jruby?
-              unsupported "No default url available on JRuby"
-            end
+          control_url_desc = "The bind url to use for the control server. Use 'auto' to use temp unix server"
+
+          o.on "--control-url URL", control_url_desc do |arg|
+            configure_control_url(arg)
+          end
+
+          # alias --control-url for backwards-compatibility
+          o.on "--control URL", control_url_desc do |arg|
+            configure_control_url(arg)
           end
 
           o.on "--control-token TOKEN",