Describes packed messagebase declaration

cfgs/config/advanced.cfg

@@ -1874,6 +1874,9 @@ AREALISTFORMAT "AM E CPUN G "          ; layout without descs
 -- MANUAL AREA DEFINITIONS
 
 // Area definitions using the AREADEF keyword.
+// NOTE: for OPUS/FIDO messagebases only directory name should be
+// specified, for another messagebases file suffixes should not be
+// specified
 ;Syntax: Echoid   "Description"  Groupid Type  Format  Path or board    Aka (Attributes) "Origin"
 ;AREADEF NMAIL  "Nmail"  A Net   JAM    C:\FIDO\HPT\MSGBASE\NMAIL  . (Loc Pvt)
 ;AREADEF BAD    "Bad"    A Net   JAM    C:\FIDO\HPT\MSGBASE\BAD  . (Loc Pvt)
@@ -1889,6 +1892,34 @@ AREALISTFORMAT "AM E CPUN G "          ; layout without descs
 // and sample of golded.bat.
 ;AREADEF TRASHCAN "Trash Can for deleted messages" Z Local Opus M:\SQUISH\TRASHCAN\ . (Loc Lok)
 
+
+// Packed messagebase (read only!) - declaration.
+// (Packed messagebase identified with attribute "Pkd")
+// NOTE: packed messagebase file suffix (extention in DOS term) should be specified!
+AreaDef ZIP.MAIL "Zipped netmail" L Echo  Squish  C:\FIDO\SQBASE\ZIP\zipmail.zip . (Loc Pkd)
+
+
+// Read packed messagebase - unpacker definitions.
+//
+// Syntax:
+//   UNPACKER <file suffix> <"command line @file">
+// where:
+//   <file suffix> - suffix of file name of packed messagebase (file
+//                   extention in DOS term)
+//   command line  - pathname of archiver with option/command "unpack"
+//                   for specified suffix
+//   @file         - token to replacing with packed messagebase file
+//                   name
+//
+// NOTE: packed messagebase filename without suffix should be named as
+//       base filename of messagebase
+IF UNIX
+  UNPACKER zip "/usr/bin/unzip -e @file"
+ELSE
+  UNPACKER zip "C:\FIDO\SQ\pkunzip -e @file"
+ENDIF
+
+
 // Area definitions using the AREA keyword. (Old format).
 ;Syn: Echoid   "Description"      FmtTyp Path or board   Akano  Attributes
 ;AREA NETMAIL  "Netmails"           ON   M:\MSG\NETMAIL\     0  Loc Pvt