adblock: update to 1.5.1

Apply adblock updates 1.4.10-1.5.1

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

Original commit messages:

adblock: update 1.4.10
- add 'enabled' check to iface hotplug event handler
- decrease startup priority from 99 to 90
- fix tab indentation in config

adblock: update 1.5.0
* add new 'envchk'function to check adblock environment only,
  i.e. check volatile firewall rules or uhttpd instances
  without list updates
* add new optional parm 'adb_loglevel',
  set it to "0" to mute output (print only errors)
* set hotplug priority to '90' as well (missed in the last commit)
* documentation update
* cosmetics

adblock: bugfix 1.5.1
* fix uhttpd detection in tcp 4+6 configurations

net/adblock/files/adblock.init

@@ -1,11 +1,12 @@
 #!/bin/sh /etc/rc.common
 #
 
-START=99
-EXTRA_COMMANDS="toggle stats cfgup query"
+START=90
+EXTRA_COMMANDS="toggle stats cfgup envchk query"
 EXTRA_HELP="	toggle	Toggle adblock 'on' or 'off'
 	stats	Update adblock statistics
 	cfgup	Update adblock configuration file
+	envchk	Check/Set adblock environment
 	query	<DOMAIN> Query active blocklists for specific domain"
 
 adb_debug=0
@@ -159,3 +160,14 @@ query()
     fi
     return 0
 }
+
+envchk()
+{
+    adb_loglevel=0
+    f_envcheck
+    rm -f "${adb_tmpfile}"
+    rm -rf "${adb_tmpdir}"
+    adb_loglevel=1
+    f_log "adblock environment check finished successfully"
+    return 0
+}