Auto merge of #2649 - bitcartel:2576_security_url, r=str4d

Closes #2576. Update link to security info on z.cash website.

README.md

@@ -18,8 +18,8 @@ blockchain has reached a significant size.
 Security Warnings
 -----------------
 
-See important security warnings in
-[doc/security-warnings.md](doc/security-warnings.md).
+See important security warnings on the
+[Security Information page](https://z.cash/support/security/).
 
 **Zcash is experimental and a work-in-progress.** Use at your own risk.
 

src/util.cpp

@@ -892,7 +892,7 @@ std::string PrivacyInfo()
 {
     return "\n" +
            FormatParagraph(strprintf(_("In order to ensure you are adequately protecting your privacy when using Zcash, please see <%s>."),
-                                     "https://z.cash/support/security/index.html")) + "\n";
+                                     "https://z.cash/support/security/")) + "\n";
 }
 
 std::string LicenseInfo()