fixing API-XML syntax and add some documentation

.gitignore

@@ -1,2 +1,3 @@
 *.config
+!dist.config.sample
 nsupdate.sh.log

README.md

@@ -10,10 +10,20 @@ In order to run you need to have _curl_ and _awk_ installed, as well as _drill_
 
 Simply download the `master.zip` and extract it, e.g., using `wget` and `7z x master.zip`.
 
-Place your config files in the `nsupdate.d` folder. A `sample.config.dist` is provided. At least one config file needs to exist, ending with `.config. 
+Place your config files in the `nsupdate.d` folder. A `dist.config.sample` is provided. At least one config file needs to exist, ending with `.config.  
+All .config files will be processed by looping them.  
+Simply copy the provided dist.config.sample and adjust your config to your needs.
+For home.example.com you may create:  
+home.example.com-ipv4.config and/or  
+home.example.com-ipv6.config  
 
 ## Changelog
 
+**2019-12-20**
+
+- Fixing API-XML syntax
+- Added some more documentation
+
 **2015-07-22**
 
 - Changed the way how the existence of config files is checked

nsupdate.d/dist.config.sample

@@ -1,9 +1,13 @@
 # nsupdate.config
+# The nsupdate.sh is processing all .config files by looping.
+# If you want to update an IPv4 and an IPv6 record you need two config files.
 
 # Log file name.
 LOG="$0.log"
 
 # From which site should we get your WAN IP?
+# Note that for IPv4 or IPv6 the IP_CHECK_SITE should work
+# e.g. for IPv4 use api.ipify.org and for IPv6 use api6.ipify.org
 IP_CHECK_SITE="https://api.ipify.org/"
 
 # Use drill instead of nslookup for hostname lookup.
@@ -23,7 +27,7 @@ INWX_USER="USERNAME"
 INWX_PASS="PASSWORD"
 
 # The hostname that you want to update and it's ID from the inwx interface.
-# Note: You can get the domain ID while editing the given nameserver entry by
+# Note: You can get the specific domain record ID while editing the given nameserver entry by
 #       inspecting the target URL of the save button.
 DOMAIN="DOMAIN"
 INWX_DOMAIN_ID="123456789"

nsupdate.sh

@@ -91,6 +91,12 @@ if ls $(dirname $0)/nsupdate.d/*.config &> /dev/null; then
                            <string>$INWX_USER</string>
                         </value>
                      </member>
+                     <member>
+                        <name>lang</name>
+                        <value>
+                           <string>en</string>
+                        </value>
+                     </member>
                      <member>
                         <name>pass</name>
                         <value>
@@ -109,6 +115,12 @@ if ls $(dirname $0)/nsupdate.d/*.config &> /dev/null; then
                            <string>$WAN_IP</string>
                         </value>
                      </member>
+                     <member>
+                        <name>ttl</name>
+                        <value>
+                           <int>300</int>
+                           </value>
+                     </member>
                   </struct>
                </value>
             </param>