LibTLS+Everywhere: Switch to using WolfSSL

This commit replaces all TLS connection code with wolfssl.
The certificate parsing code has to remain for now, as wolfssl does not
seem to have any exposed API for that.

vcpkg.json

@@ -33,6 +33,7 @@
     },
     "sqlite3",
     "woff2",
+    "wolfssl",
     {
       "name": "vulkan",
       "platform": "!android"
@@ -70,6 +71,10 @@
     {
       "name": "woff2",
       "version": "1.0.2#4"
+    },
+    {
+      "name": "wolfssl",
+      "version": "5.7.0#1"
     }
   ]
 }