Adds parameter "-k" to every way of calling curl, hence allowing

calling https URLs without checking for the validity of SSL
certificates.
While this makes it a little insecure, nothing else can be done
while keeping the HTTPClient API simple: openwrt does not have a
SSL certificates bundle
Advanced users concerned about security should call "curl" on
their own using Process, supplying parameters such as "--cacert"
Fixes #1860

libraries/Bridge/src/HttpClient.cpp

@@ -20,24 +20,28 @@
 
 unsigned int HttpClient::get(String &url) {
   begin("curl");
+  addParameter("-k");
   addParameter(url);
   return run();
 }
 
 unsigned int HttpClient::get(const char *url) {
   begin("curl");
+  addParameter("-k");
   addParameter(url);
   return run();
 }
 
 void HttpClient::getAsynchronously(String &url) {
   begin("curl");
+  addParameter("-k");
   addParameter(url);
   runAsynchronously();
 }
 
 void HttpClient::getAsynchronously(const char *url) {
   begin("curl");
+  addParameter("-k");
   addParameter(url);
   runAsynchronously();
 }