Changelog says to look into sourcecode to see how SSLCERT and SSLMITM function works but the is no way to compile it using ./confiugre.
On freebsd, I've changed ports Makefile to workaround(using sed) this by changing ifdef to ifndef on SSLCERT and SSLMITM calls
This way ssl options start compiling but stop on compilation errors
build errors
most erros was just a missing compile arg but Auth.cpp fails to compile with SSLCERT option selected
Auth.cpp: In function 'AuthPlugin auth_plugin_load(const char)':
Auth.cpp:161: error: 'sslcorecreate' was not declared in this scope
Auth.cpp:168: error: 'sslcorecreate' was not declared in this scope
*** Error code 1
Stop in /usr/ports/www/dansguardian-devel/work/dansguardian-2.12.0.3/src.
*** Error code 1
If I add the reference manually(extern authcreate_t sslcorecreate;), it stops on missing authplugin file
*** Error code 1
Stop in /usr/ports/www/dansguardian-devel/work/dansguardian-2.12.0.3/src.
[root@bsd816 /usr/ports/www/dansguardian-devel/work/dansguardian-2.12.0.3/src]# ls authplugins/
digest.cpp ident.cpp ip.cpp ntlm.cpp proxy.cpp