adblock: backport updates upto 2.4.0-2

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Original commit messages:

adblock: update 2.3.2
* optimize memory consumption &
  enable overall sort only on devices with > 64MB RAM,
  this prevents sort related kernel dumps
(cherry picked from commit 8c5b9a0802)

adblock: release 2.4.0
* add tld compression,
  this new "top level domain compression" removes up to 40 thousand
  needless host entries from the block lists and
  lowers the memory footprint for the dns backends by 8-10 MByte
* optimize restart behavior in case of an error
* cosmetics
(cherry picked from commit ed470f0dcc)

adblock: release 2.4.0 (release 2)
* add missing sort step if tld compression was disabled
(cherry picked from commit b3b9972eac)

net/adblock/files/README.md

@@ -57,6 +57,7 @@ A lot of people already use adblocker plugins within their desktop browsers, but
 * automatically selects uclient-fetch or wget as download utility (other tools like curl or aria2c are supported as well)
 * automatically supports a wide range of router modes, even AP modes are supported
 * full IPv4 and IPv6 support
+* supports tld compression (top level domain compression), this feature removes thousands of needless host entries from the block lists and lowers the memory footprint for the dns backends
 * each block list source will be updated and processed separately
 * block list source parsing by fast & flexible regex rulesets
 * overall duplicate removal in separate block lists
@@ -120,6 +121,7 @@ A lot of people already use adblocker plugins within their desktop browsers, but
     * adb\_iface => restrict the procd interface trigger to a (list of) certain wan interface(s) or disable it at all (default: not set, disabled)
     * adb\_fetch => full path to a different download utility, see example below (default: not set, use wget)
     * adb\_fetchparm => options for the download utility, see example below (default: not set, use wget options)
+    * adb\_tldcomp => enable/disable tld compression (default: '1', enabled)
 
 ## Examples
 
@@ -136,19 +138,19 @@ If you use manual configuration for unbound, then just include the following lin
 <pre><code>
 wget (default):
   option adb_fetch="/usr/bin/wget"
-  option adb_fetchparm="--no-config --quiet --tries=1 --no-cache --no-cookies --max-redirect=0 --timeout=5 --no-check-certificate -O"
+  option adb_fetchparm="--no-config --quiet --no-cache --no-cookies --max-redirect=0 --timeout=10 --no-check-certificate -O"
 
 aria2c:
   option adb_fetch '/usr/bin/aria2c'
-  option adb_fetchparm '-q --max-tries=1 --timeout=5 --allow-overwrite=true --auto-file-renaming=false --check-certificate=false -o'
+  option adb_fetchparm '-q --timeout=10 --allow-overwrite=true --auto-file-renaming=false --check-certificate=false -o'
 
 uclient-fetch:
   option adb_fetch '/bin/uclient-fetch'
-  option adb_fetchparm '-q --timeout=5 --no-check-certificate -O'
+  option adb_fetchparm '-q --timeout=10 --no-check-certificate -O'
 
 curl:
   option adb_fetch '/usr/bin/curl'
-  option adb_fetchparm '-s --retry 1 --connect-timeout 5 --insecure -o'
+  option adb_fetchparm '-s --connect-timeout 10 --insecure -o'
 </code></pre>
   
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