* remove "downloads" category from shallalist default configuration, due
to false positives (i.e. debian & microsoft update sites)
* remove example white- & blacklist entries
* further optimize shallalist handling
* fix domain merging with empty whitelist
* various minor fixes & enhancements
* documentation update


Signed-off-by: Dirk Brenken <dirk@brenken.org>

* rework shallalist processing: significantly reduce memory consumption
during archive extraction and merging.
* considerable reduce memory consumption during adblock source
processing.
* considerable reduce memory consumption of sort (sorts only the domain
list and not the bigger dnsmasq file)

other changes:
* auto detection/defaults for adb_if, adb_dev, adb_ntpsrv, adb_maxloop,
adb_maxtime and adb_minspace - these options can be safely removed from
previous adblock configuration file
* check total memory and main uhttpd configuration on startup
* documentation update

Signed-off-by: Dirk Brenken <dirk@brenken.org>

- centralized logging via separate function to stdout, syslog and file
- remove dependencies between helper functions
- add two new options "adb_maxtime" and "adb_maxloop"
- add description to every adblock config option (see
adblock.conf.sample)
- update README.md

Signed-off-by: Dirk Brenken <dirk@brenken.org>

* add uci support
* add dynamic uhttpd instance support
  (no longer rely on uhttpd config changes)
* package reordering
* plus various fixes

Signed-off-by: Dirk Brenken <dirk@brenken.org>