Man pages matching name ne_ssl_cert_cmp in section 3:

ne_ssl_cert_cmp.3.en	debian 10 / libneon27-dev
ne_ssl_cert_cmp.3.en	debian 10 / libneon27-gnutls-dev
ne_ssl_cert_cmp.3.en	debian 11 / libneon27-dev
ne_ssl_cert_cmp.3.en	debian 11 / libneon27-gnutls-dev
ne_ssl_cert_cmp.3.en	debian 12 / libneon27-dev
ne_ssl_cert_cmp.3.en	debian 12 / libneon27-gnutls-dev