OpenSSL deprecated API

[Jafaral]

OpenSSL deprecated some functions with 3.0 that we are still using in FRR:

ospfd/ospf_auth.c: In function ‘ospf_auth_check_hmac_sha_digest’:
ospfd/ospf_auth.c:129:9: warning: ‘HMAC_CTX_new’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  129 |         ctx = HMAC_CTX_new();
      |   

[donaldsharp]

as a note -> I believe if we do not specify a specific version of openSSL then we should support new and old in the code :( Something that just needs to be thought about