Precedence_of_Settings

   There are potentially four sources of configuration settings
   which are shown below in decreasing order of precedence:

   1. Unchangeable, system-wide settings from the PMDF_
      TABLE:PINE.CONF-FIXED file.

   2. Per-user settings from the user's PMDF_INIT:PINE.PINERC file.

   3. System-wide settings from the PMDF_TABLE:PINE.CONF file.

   4. Default Pine values.

   One exception to the above precedence scheme is the FEATURE-LIST
   option which is cumulative. In order to turn off a feature, you
   have to negate it by prepending NO- in front of an individual
   feature.