IDEA-163490 Force the use of https in connections to PivotalTracker

Old Apache HttpClient doesn't allow to enable following redirects
for HTTP requests containing entities. Instead I replace "http:"
with "https:" in server URLs of existing connectors so as not to make
their users re-configure everything or modify the address manually.

plugins/tasks/tasks-core/src/com/intellij/tasks/pivotal/PivotalTrackerRepository.java

@@ -51,7 +51,7 @@ public class PivotalTrackerRepository extends BaseRepositoryImpl {
 
   {
     if (StringUtil.isEmpty(getUrl())) {
-      setUrl("http://www.pivotaltracker.com");
+      setUrl("https://www.pivotaltracker.com");
     }
   }
 
@@ -292,6 +292,7 @@ public class PivotalTrackerRepository extends BaseRepositoryImpl {
   @Override
   protected void configureHttpMethod(final HttpMethod method) {
     method.addRequestHeader("X-TrackerToken", myAPIKey);
+    //method.setFollowRedirects(true);
   }
 
   public String getProjectId() {
@@ -384,4 +385,12 @@ public class PivotalTrackerRepository extends BaseRepositoryImpl {
   protected int getFeatures() {
     return super.getFeatures() | BASIC_HTTP_AUTHORIZATION | STATE_UPDATING;
   }
+
+  @Override
+  public void setUrl(String url) {
+    if (url.startsWith("http:")) {
+      url = "https:" + StringUtil.trimStart(url, "http:");
+    }
+    super.setUrl(url);
+  }
 }