Thanks for the suggestions. In trying to build NS from git, I ran into this error:
tls.c: In function ‘Ns_TLS_CtxClientCreate’:
tls.c:1309:9: error: unknown type name ‘SSL_verify_cb’
SSL_verify_cb verifyCB = NULL;
^
A little searching led me to install openssl11 and openssl11-devel to pick up this new type name. However, I haven't been able to instruct NS to use the newer version. I tried exporting OPENSSL_CFLAGS, OPENSSL_LIBS, CPPFLAGS and LDFLAGS along with modifying the script with --with-openssl=/usr.
Any ideas on how to move past this?