Load a list of YAML config files.
Arguments
- dir
 A path to directory with YAML config files.
- cfg_defs
 A list of lists of length three. In each list, the first item is a name of YAML file in
dir, the second one is a name in the resulting named list, and the third one is a processing function.- other_variables
 Passed to
load_config().- process
 A logical scalar: if
TRUE, apply a processing function on its associated config list.- ...
 Currently not used.