* fix problem with lucihelper script reported in OpenWrt Ticket 19419
* rewritten split_FQDN fixing detection errors and using zcat
* updated tld_names.dat and .gz compressed to save space
* add LoopiaDNS (loopia.se) to services_ipv6

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

modified source directory structure
  - files for production files
  - samples for sample files (not installed in final build)
modified Makefile
  - separate options for additional provider scripts
  - remove comments and empty lines from final build
add IPv4 100.64/10 (RFC 6598) and 169.254/16 (RFC 5735) to the range of default blocked IP's.
new option "bind_network" to force GNU Wget or cURL to use specific network/interface for communication
new "domains.google.com" as IPv4 DDNS provider #822

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

restructure startup of dnymaic_dns_updater.sh
 - first run load_all_config_options (it returns 1 if SECTION_ID not found) #779
 - set all defaults if necessary
 - verify if username and/or password is needed inside update_url #779
 - remove wait - will be done by retry_interval and retry_count if communication fails
provider specific update scripts
 - verify if username/password are needed
services_ipv6
 - added freedns.afraid.org
 - IPv6 should work due to their documentation
minor fixes

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

- removed special handling for dynamic_dns_helper.sh and url_escape.sed in Makefile/postinst
- minor fixes in logging
- allow retry_count of "0" to run infinite retrys on error
	-- https://dev.openwrt.org/ticket/18382
- changed naming of .dat and .err file to have one per section, not one per process
- defer hotplug helper from 25-ddns to 95-ddns (according initscript START=95)
	-- https://github.com/openwrt/packages/issues/568 (#568)
- fix commandline for busybox wget
	-- https://dev.openwrt.org/ticket/18411
	-- https://dev.openwrt.org/ticket/18437
	-- https://github.com/openwrt/packages/issues/605 (#605)
- remove checking answer from ddns provider because there are to many different.
	Some providers do not follow API from dyndns.com

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

- moved /usr/lib/ddns/dynamic_dns_lucihelper.sh from luci-app-ddns into this package
	(Github openwrt/luci issue 251)
	(OpenWrt Trac tickets 18326 18347)
- fix: dynamic_dns_update.sh did not loop
	(OpenWrt Trac ticket 18336)
- add provider cloudflare.com IPv4 and IPv6 (Thanks to Paul for support and testing)
	(OpenWrt Trac ticket 12500)
- modified detection, if dynamic_dns_fuctions are used by dynamic_dns_lucihelper.sh
- redirect stdout of wget,curl,host,nslookup,nc etc to /tmp/ddns_$$.dat and *.err instead of variables
- extended error detection in get_local_ip function
- modified verify of option ip_script to allow parameters, when calling
- add provider selfhost.de IPv4
- add provider no-ip.pl (nothing to do with no-ip.com)
	(Github openwrt/packages issue #542)
	IPv4 (tested) and also added for
	IPv6 (NOT tested) because client IP is autodetected be provider
- add getlocalip_sample.sh as sample script for usage of
	option ip_source 'script'  together with
	option ip_script '/usr/lib/ddns/getlocalip.sh -4'
- cleanup whitespaces at line ends

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