Prefix external subcommands with pijul-

Dependencies

• [2] SNZ3OAMC use native external subcommand support instead of hand-rolled one
• [3] RJMQSZER External commands
• [*] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• replacement in pijul/src/main.rs at line 201
  [2.421]→[2.421:448](∅→∅)
  − let cmd = &command[0];
  [2.421]

  [2.448]
  + let mut cmd: OsString = "pijul-".into();

  + cmd.push(&command[0]);
• replacement in pijul/src/main.rs at line 211
  [2.571]→[2.571:598](∅→∅)
  − let cmd = &command[0];
  [2.571]

  [2.598]
  + let mut cmd: OsString = "pijul-".into();

  + cmd.push(&command[0]);