Please update the ldconfig man page: the config files that are placed into /usr/local/libdata/ldconfig are not mentioned anywhere.
The files in /usr/local/libdata/ldconfig/ are created by ports framework and shouldn't be documented in ldconfig(8) as ldconfig doesn't read them by itself, it's rather 'rc' doing, and the related variables are documented in rc.conf(5): ldconfig_local_dirs ldconfig32_local_dirs ...and these are set to include /usr/local/libdata/ldconfig/ by default: /etc/defaults/rc.conf:ldconfig_local_dirs="/usr/local/libdata/ldconfig" /etc/defaults/rc.conf:ldconfig_local32_dirs="/usr/local/libdata/ldconfig32"