Red Haberdashers, it would be nice if a future release of the Squid RPM included some of the authentication modules (found in the auth_modules directory of the Squid tarball), e.g. ncsa_auth and perhaps pam_auth. These are used when configuring Squid for proxy authentication - a helpful thing in some circumstances. These aren't built automatically, but they are very simple to build (just do a make in the right directory.) They could be put e.g. in /usr/lib/squid or /usr/libexec/squid. Thanks!
Will be fixed in 2.3.STABLE4-7; thanks for the idea.