LibTLS: Implement a preliminary version of the TLS protocol

TLS::TLSv12 is a Core::Socket, however, I think splitting that into a
TLS::Socket would probably be beneficial

Libraries/LibCrypto/Cipher/Mode/CBC.h

@@ -119,6 +119,7 @@ namespace Cipher {
                 length -= block_size;
                 offset += block_size;
             }
+            out.trim(offset);
             this->prune_padding(out);
         }
     };