mod_disk_cache directives naming convention

[Jean-Jacques Clar]

All the directives for mod_mem_cache are preceded with an "M". The ones for mod_cache are starting with a "c" Should all the disk_cache directives be preceded with a "D" for consistency and clarity? I know it is going to break every user configuration, but before the modules move out of experimental is probably the less painful time to do that change.   Thanks, JJ