anchor.diff:  %%%         <dd>Give `Secs' deadline for the port program to clean up
   %%%             child pids before exiting</dd>
   %%%     <dt>{user, User}</dt>
  -%%%         <dd>When port program is owned by root, this option must be
  -%%%             specified so that the port program is not running under
  -%%%             root account.</dd>
  +%%%         <dd>When the port program was compiled with capability (Linux)
  +%%%             support enabled, and is owned by root with a a suid bit set,
  +%%%             this option must be specified so that upon startup the port
  +%%%             program is running under the effective user different from root.
  +%%%             This is a security measure that will also prevent the port program
  +%%%             to execute root commands.</dd>
   %%%     <dt>{limit_users, LimitUsers}</dt>
   %%%         <dd>Limit execution of external commands to these set of users.
   %%%             This option is only valid when the port program is owned
  
positive.code:     proplists:get_value(Option, default()).
  
  get_opt({Option, Value}) -> {Option, Value};
  get_opt(debug)           -> {debug, true}.
  
  %%%----------------------------------------------------------------------
  
negative.code: %%%             SIGTERM/SIGKILL combination is used for process
  %%%             termination.</dd>
  %%%     <dt>{user, RunAsUser}</dt>
  %%%         <dd>When exec-port was compiled with capability (Linux) support
  %%%             enabled and has a suid bit set, it's capable of running
  %%%             commands with a different RunAsUser effective user. Passing
  %%%             "root" value of `RunAsUser' is prohibited.</dd>
  %%%     <dt>{nice, Priority}</dt>
  %%%         <dd>Set process priority between -20 and 20. Note that
  %%%             negative values can be specified only when `exec-port'
  