rename the existing SSL test to clarify that it uses the server's
private key for decryption
Change-Id: I13598fc4cf724b144a8f27bfa7a3316acfc78728
Reviewed-on: https://code.wireshark.org/review/640
Reviewed-by: Martin Kaiser <wireshark@kaiser.cx>
Tested-by: Martin Kaiser <wireshark@kaiser.cx>