Currently this 3 variable are used only 1 time in the sh script and cause 10s of delay for them to load... move them to load only if it's required by the command. This also fix luci-app-ddns delay problem derived by calling dns_lucihelper (that use tdns_functions to load data) for the version.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

Write *.ip file with current registered IP, whenever "get_registered_IP" is called (used by next luci-app-ddns version)
Changed detection of cURL proxy support #3876
Reread data from ubus if "get_local_ip" from "ip_network" #5004 #3338
Fix godaddy_com_v1 #5285
Implement "param_opt" for "cloudflare_com_v4" #5097
Inside logfile "*password*" printed in stead of real password #5281 and others
Add ipv4 service "dnsever.com" #5178
Add ipv4 service "myip.co.ua" #5199

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

- cloudflare v1 change syntax of option domain to "host.sub@example.com" like already cloudflare v4 and godaddy to prepare logterm remove of public_suffix_list.dat from package
- change Makefile to be backportable to CC15.05 and working on DD
- change ddns.defaults to prepare future releases of ddns-scripts
- minor fixes

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

Fix return codes, if ip data at Godaddy.com and Cloudflare.com are
already up to date, handle it as succesful update.

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

- tld_names.dat.gz
  - rename to public_suffix_list.dat.gz
  - (re)created during build
  - new location /usr/share
- move services files to /etc/ddns
- new services
  - CloudFlare.com-v4 using API-Version 4 without using public_suffix_list.dat
  - GoDaddy.com
  - both depending on cURL package
  - both with modified syntax for option domain ( NEW: [host[.subdom]@]domain.tld )
- new service
  - Now-DNS.com formerly Now-IP.com
- service afraid.org now supports key-auth and basic-auth
- new command line options for dynamic_dns_updater.sh and dynamic_dns_updater.sh
- adapted ddns.init and ddns.hotplug to new command line options
- renaming config options inside section global

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