Module update for IO::Ptty

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Record update in the PAUSE modules database:

       modid: [IO::Ptty]
       statd: [a]
       stats: [d]
       statl: [c]
       stati: [f]
 description: [Pseudo terminal interface functions]
      userid: [RGIERSIG] was [GBARR]
   chapterid: [21]
    mlstatus: [list]

Data entered by Graham Barr (GBARR).
Please check if they are correct.

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