[for-15.05] privoxy: bump to 3.0.24 incl. fix for CVE-2016-1982, CVE-2016-1983

[for-15.05] privoxy: bump to 3.0.24 incl. fix for CVE-2016-1982, CVE-2016-1983

* upstream to Privoxy 3.0.24
 - incl. fix for CVE-2016-1982 and CVE-2016-1983
* add facility to set compile options
* add file list to be saved on sysupgrade
* fixed PKG_MAINTAINER string
* add port 8118 used by privoxy to /etc/services
* new "boot_delay" option (default 10 seconds) to wait for interfaces to come up before hotplug restarts are enabled

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>