Fixed memory leaking

+ Patch on memory leaking for Windows netstat module (do not effect any of the previous non Windows builds)
+ Fixed potential memory leak in acme handler logic
+ Added "do you want to get a TLS certificate for this subdomain?" dialog when a new subdomain proxy rule is created

src/web/snippet/acme.html

@@ -83,8 +83,8 @@
       </div>
   </div>
   <div class="ui divider"></div>
-  <h3>Manual Renew</h3>
-  <p>Pick a certificate below to force renew</p>
+  <h3>Generate New Certificate</h3>
+  <p>Enter a new / existing domain(s) to request new certificate(s)</p>
   <div class="ui form">
     <div class="field">
       <label>Domain(s)</label>