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+Install-progress reporting 
+--------------------------
+
+If the apt options: "APT::Status-Fd" is set, apt will send status
+reports to that fd. The status information is seperated with a ':', 
+there are the following status conditions:
+
+status = {"pmstatus", "dlstatus", "conffile-prompt", "error" } 
+
+The reason for using a fd instead of a OpProgress class is that many
+apt frontend fork a (vte) terminal for the actual installation.
+
+The reason to do the mapping and l10n of the dpkg states to human
+readable (and translatable) strings is that this way the translation
+needs to be done only once for all frontends.
+
+
+pmstatus
+--------
+Status of the package manager (dpkg). This is send when packages
+are installed/removed.
+pmstatus:pkgname:TotalPercentage:action-description
+
+PkgName = the name of the package
+TotalPercentage = the total progress between [0..100] 
+description = a i18ned human readable decription of the current action
+
+
+Example:
+# ./apt-get install -o APT::Status-Fd=2 3dchess >/dev/null
+pmstatus:3dchess:20:Preparing 3dchess
+pmstatus:3dchess:40:Unpacking 3dchess
+pmstatus:3dchess:60:Preparing to configure 3dchess
+pmstatus:3dchess:80:Configuring 3dchess
+pmstatus:3dchess:100:Installed 3dchess
+
+
+dlstatus
+--------
+dlstatus:AlreadDownloaded:TotalPercentage:action-description
+
+AlreadyDownloaded = the number of already downloaded packages
+TotalPercentage = the total progress between [0..100] 
+description = a i18ned human readable decription of the current action
+
+Example:
+dlstatus:1:9.05654:Downloading file 1 of 3 (4m40s remaining)
+dlstatus:1:9.46357:Downloading file 1 of 3 (4m39s remaining)
+dlstatus:1:9.61022:Downloading file 1 of 3 (4m38s remaining)
+\ No newline at end of file