Using --chain causes SIGSEGV when compiled with openssl >= 1.1

[nickolasburr]

Tested the following versions on macOS Big Sur (11.6.5):

1. [email protected] (1.1.1n)
2. openssl@3 (3.0.2)

Using the --chain option causes a segfault to occur due to an uninitialized pointer. With the transition to opaque types in openssl 1.1.0, it's no longer possible to directly access struct members to retrieve certificate information and will require utilizing the respective accessor functions to get the needed information.