Doc updates for compatibility

Author: dpkp

docs/compatibility.rst

@@ -16,6 +16,7 @@ Although kafka-python is tested and expected to work on recent broker versions,
 not all features are supported. Please see github open issues for feature tracking.
 PRs welcome!
 
-kafka-python is tested on python 2.7, and 3.8-3.13.
+kafka-python is tested on python 3.8-3.14.
+python 2.7 was supported through kafka-python release 2.3.
 
 Builds and tests via Github Actions Workflows.  See https://github.com/dpkp/kafka-python/actions

kafka/admin/client.py

@@ -119,8 +119,7 @@ class KafkaAdminClient(object):
         ssl_crlfile (str): Optional filename containing the CRL to check for
             certificate expiration. By default, no CRL check is done. When
             providing a file, only the leaf certificate will be checked against
-            this CRL. The CRL can only be checked with Python 3.4+ or 2.7.9+.
-            Default: None.
+            this CRL. Default: None.
         api_version (tuple): Specify which Kafka API version to use. If set
             to None, KafkaClient will attempt to infer the broker version by
             probing various APIs. Example: (0, 10, 2). Default: None

kafka/consumer/group.py

@@ -201,8 +201,7 @@ class KafkaConsumer(object):
         ssl_crlfile (str): Optional filename containing the CRL to check for
             certificate expiration. By default, no CRL check is done. When
             providing a file, only the leaf certificate will be checked against
-            this CRL. The CRL can only be checked with Python 3.4+ or 2.7.9+.
-            Default: None.
+            this CRL. Default: None.
         ssl_ciphers (str): optionally set the available ciphers for ssl
             connections. It should be a string in the OpenSSL cipher list
             format. If no cipher can be selected (because compile-time options

kafka/producer/kafka.py

@@ -292,21 +292,20 @@ class KafkaProducer(object):
             will be ignored. Default: None.
         ssl_check_hostname (bool): flag to configure whether ssl handshake
             should verify that the certificate matches the brokers hostname.
-            default: true.
+            Default: True.
         ssl_cafile (str): optional filename of ca file to use in certificate
-            verification. default: none.
+            verification. Default: None.
         ssl_certfile (str): optional filename of file in pem format containing
             the client certificate, as well as any ca certificates needed to
-            establish the certificate's authenticity. default: none.
+            establish the certificate's authenticity. Default: None.
         ssl_keyfile (str): optional filename containing the client private key.
-            default: none.
+            Default: None.
         ssl_password (str): optional password to be used when loading the
-            certificate chain. default: none.
+            certificate chain. Default: None.
         ssl_crlfile (str): optional filename containing the CRL to check for
             certificate expiration. By default, no CRL check is done. When
             providing a file, only the leaf certificate will be checked against
-            this CRL. The CRL can only be checked with Python 3.4+ or 2.7.9+.
-            default: none.
+            this CRL. Default: None.
         ssl_ciphers (str): optionally set the available ciphers for ssl
             connections. It should be a string in the OpenSSL cipher list
             format. If no cipher can be selected (because compile-time options