.UpdateLineTag.
      All file with some selected extension name can be set CID(ChangeID).
       ex) for all .c file are taged on updated line by the format of
           //~yymdd~ (yy:year,m:month,dd:day)
      Correspondency of extension name and format is specified on
      .INI file(Change_ID_Type_xx)                        Chapter(6)
      Other format than DATE ex. version number,or files with other
      type of extension name can be set by putting a,say,CID header
      line on the first line of the file.
      ex) //CID://+v010R~: specify that tag format is fixed to //~v010~R.
      Sample CID header line is inserted by "cid top" or "cid topa" cmd.
      To free to set tag temporaly use CID command.