added dns_records/export documentation

Author: mahtin

README.md

@@ -622,7 +622,7 @@ $ cli4 /zones/:example.com/dnssec
 $
 ```
 
-### Zone file upload CLI examples
+### Zone file upload and download CLI examples (uses BIND format files)
 
 Refer to [Import DNS records](https://api.cloudflare.com/#dns-records-for-a-zone-import-dns-records) on API documentation for this feature.
 
@@ -650,6 +650,27 @@ $ cli4 --post file=@zone.txt /zones/:example.com/dns_records/import
 $
 ```
 
+The following is documented within the **Advanced** option of the DNS page within the Cloudflare portal.
+
+```
+$ python -m cli4 /zones/:example.com/dns_records/export | jq -r . | egrep -v '^;;|^$'
+$ORIGIN .
+@	3600	IN	SOA	example.com.	root.example.com.	(
+		2025552311	; serial
+		7200		; refresh
+		3600		; retry
+		86400		; expire
+		3600)		; minimum
+example.com.	300	IN	NS	REPLACE&ME$WITH^YOUR@NAMESERVER.
+record4.example.com.	300	IN	TXT	"some text"
+record3.example.com.	300	IN	CNAME	record1.example.com.
+record1.example.com.	300	IN	A	10.0.0.1
+record2.example.com.	300	IN	AAAA	2001:d8b::2
+$
+```
+
+The **jq -r** option is used to convert newlines and tabs within the JSON response data. The egrep is used for documentation brevity.
+
 ## Implemented API calls
 
 The **--dump** argument to cli4 will produce a list of all the call implemented within the library.

README.rst

@@ -685,8 +685,8 @@ DNSSEC CLI examples
     }
     $
 
-Zone file upload CLI examples
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Zone file upload and download CLI examples (uses BIND format files)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Refer to `Import DNS
 records <https://api.cloudflare.com/#dns-records-for-a-zone-import-dns-records>`__
@@ -716,6 +716,29 @@ on API documentation for this feature.
     }
     $
 
+The following is documented within the **Advanced** option of the DNS
+page within the Cloudflare portal.
+
+::
+
+    $ python -m cli4 /zones/:example.com/dns_records/export | jq -r . | egrep -v '^;;|^$'
+    $ORIGIN .
+    @   3600    IN  SOA example.com.    root.example.com.   (
+            2025552311  ; serial
+            7200        ; refresh
+            3600        ; retry
+            86400       ; expire
+            3600)       ; minimum
+    example.com.    300 IN  NS  REPLACE&ME$WITH^YOUR@NAMESERVER.
+    record4.example.com.    300 IN  TXT "some text"
+    record3.example.com.    300 IN  CNAME   record1.example.com.
+    record1.example.com.    300 IN  A   10.0.0.1
+    record2.example.com.    300 IN  AAAA    2001:d8b::2
+    $
+
+The **jq -r** option is used to convert newlines and tabs within the
+JSON response data. The egrep is used for documentation brevity.
+
 Implemented API calls
 ---------------------