* Makefile_admin_PL: restored some variables

  These were used for creating mapserver/brb/Makefile.*.inc
* removed unused RADZEIT variables
* cbbbike works again

  Problem was that $StrassenNetz::FMT_ARRAY was used, which apparently
  does not work anymore.
* debian package Makefile: added pre-check target
* use nicer favicon on mapserver page

  srtbike1.ico looks better (anti-aliased!) than the default
  favicon.ico.
* data update (minor)
* private upload track functionality in bbbikeleaflet.cgi

  This is a combination of the following changes:
  * bbbikeleaflet.cgi has a new (secret) parameter upl, which adds a new
    UPL (upload) button
  * the new upload-track.cgi is added to the list of CGI_SCRIPTS
  * bundled json2.js from github.com/douglascrockford, both long and
    minified version
* new images, with a bbbike and leaflet icon combination

  Three versions:
  * 16x16, usable as a favicon
  * 57x57, usable as a iOS touch icon
  * 57x57 with integrated "upload" icon
* bbbikeleaflet improvements
  * favicon and apple-touch-icon
  * apple-touch-icon differs depending on upload capability
  * use upload-track.cgi in the same directory like bbbikeleaflet.cgi
    (using another host for sending ajax request does not work anyway)
* MANIFEST update
* make upload-track.cgi available on the next deployment
* changed example in rawjsontrk2gpsman.pl Pod

  The default location for the uploaded tracks has changed.
* show_info window in Perl/Tk app: use BBBike+Leaflet icons