Add ValiCert's root CA to QSslSocket's list to fix an "invalid username/password" error when connecting to Grooveshark on a Windows machine that didn't have all the root CAs installed.

Fixes issue 2532
(cherry picked from commit 6ab38e0093)

data/data.qrc

@@ -336,5 +336,6 @@
         <file>icons/32x32/search.png</file>
         <file>schema/schema-35.sql</file>
         <file>schema/schema-36.sql</file>
+        <file>grooveshark-valicert-ca.pem</file>
     </qresource>
 </RCC>

data/grooveshark-valicert-ca.pem

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIC5zCCAlACAQEwDQYJKoZIhvcNAQEFBQAwgbsxJDAiBgNVBAcTG1ZhbGlDZXJ0
+IFZhbGlkYXRpb24gTmV0d29yazEXMBUGA1UEChMOVmFsaUNlcnQsIEluYy4xNTAz
+BgNVBAsTLFZhbGlDZXJ0IENsYXNzIDIgUG9saWN5IFZhbGlkYXRpb24gQXV0aG9y
+aXR5MSEwHwYDVQQDExhodHRwOi8vd3d3LnZhbGljZXJ0LmNvbS8xIDAeBgkqhkiG
+9w0BCQEWEWluZm9AdmFsaWNlcnQuY29tMB4XDTk5MDYyNjAwMTk1NFoXDTE5MDYy
+NjAwMTk1NFowgbsxJDAiBgNVBAcTG1ZhbGlDZXJ0IFZhbGlkYXRpb24gTmV0d29y
+azEXMBUGA1UEChMOVmFsaUNlcnQsIEluYy4xNTAzBgNVBAsTLFZhbGlDZXJ0IENs
+YXNzIDIgUG9saWN5IFZhbGlkYXRpb24gQXV0aG9yaXR5MSEwHwYDVQQDExhodHRw
+Oi8vd3d3LnZhbGljZXJ0LmNvbS8xIDAeBgkqhkiG9w0BCQEWEWluZm9AdmFsaWNl
+cnQuY29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDOOnHK5avIWZJV16vY
+dA757tn2VUdZZUcOBVXc65g2PFxTXdMwzzjsvUGJ7SVCCSRrCl6zfN1SLUzm1NZ9
+WlmpZdRJEy0kTRxQb7XBhVQ7/nHk01xC+YDgkRoKWzk2Z/M/VXwbP7RfZHM047QS
+v4dk+NoS/zcnwbNDu+97bi5p9wIDAQABMA0GCSqGSIb3DQEBBQUAA4GBADt/UG9v
+UJSZSWI4OB9L+KXIPqeCgfYrx+jFzug6EILLGACOTb2oWH+heQC1u+mNr0HZDzTu
+IYEZoDJJKPTEjlbVUjP9UNV+mWwD5MlM/Mtsq2azSiGM5bUMMj4QssxsodyamEwC
+W/POuZ6lcg5Ktz885hZo+L7tdEy8W9ViH0Pd
+-----END CERTIFICATE-----
+

src/main.cpp

@@ -65,6 +65,7 @@
 #include <QLibraryInfo>
 #include <QNetworkCookie>
 #include <QNetworkProxyFactory>
+#include <QSslSocket>
 #include <QSqlDatabase>
 #include <QSqlQuery>
 #include <QTextCodec>
@@ -340,6 +341,15 @@ int main(int argc, char *argv[]) {
   Q_INIT_RESOURCE(data);
   Q_INIT_RESOURCE(translations);
 
+  // Grooveshark uses GoDaddy to sign its SSL certificates, which are in turn
+  // signed by a ValiCert CA.  This CA certificate isn't installed by default
+  // in Windows, it's only added by windows update, or manually browsing to a
+  // website with a certificate signed by ValiCert.  Here we explicitly add
+  // that CA to the default list used by QSslSocket, so it always works in
+  // Clementine.
+  QSslSocket::addDefaultCaCertificates(
+        QSslCertificate::fromPath(":/grooveshark-valicert-ca.pem", QSsl::Pem));
+
   // Has the user forced a different language?
   QString language = options.language();
   if (language.isEmpty()) {