Update remote urls: snappy, https, etc

Snappy URL was outdated. Similarly, many of these sites now support
https.

Author: jeffwidman

benchmarks/README

@@ -1,4 +1,4 @@
 The `record_batch_*` benchmarks in this section are written using
 ``perf`` library, created by Viktor Stinner. For more information on how to get
 reliable results of test runs please consult
-http://perf.readthedocs.io/en/latest/run_benchmark.html.
+https://perf.readthedocs.io/en/latest/run_benchmark.html.

docs/install.rst

@@ -37,7 +37,7 @@ Optional Snappy install
 Install Development Libraries
 =============================
 
-Download and build Snappy from http://code.google.com/p/snappy/downloads/list
+Download and build Snappy from https://google.github.io/snappy/
 
 Ubuntu:
 
@@ -55,9 +55,9 @@ From Source:
 
 .. code:: bash
 
-    wget http://snappy.googlecode.com/files/snappy-1.0.5.tar.gz
-    tar xzvf snappy-1.0.5.tar.gz
-    cd snappy-1.0.5
+    wget https://github.com/google/snappy/releases/download/1.1.3/snappy-1.1.3.tar.gz
+    tar xzvf snappy-1.1.3.tar.gz
+    cd snappy-1.1.3
     ./configure
     make
     sudo make install

kafka/producer/kafka.py

@@ -51,7 +51,7 @@ class KafkaProducer(object):
     'retries' is configured to 0. Enabling retries also opens up the
     possibility of duplicates (see the documentation on message
     delivery semantics for details:
-    http://kafka.apache.org/documentation.html#semantics
+    https://kafka.apache.org/documentation.html#semantics
     ).
 
     The producer maintains buffers of unsent records for each partition. These
@@ -522,7 +522,7 @@ def send(self, topic, value=None, key=None, headers=None, partition=None, timest
                 serializable to bytes via configured value_serializer. If value
                 is None, key is required and message acts as a 'delete'.
                 See kafka compaction documentation for more details:
-                http://kafka.apache.org/documentation.html#compaction
+                https://kafka.apache.org/documentation.html#compaction
                 (compaction requires kafka >= 0.8.1)
             partition (int, optional): optionally specify a partition. If not
                 set, the partition will be selected using the configured

kafka/record/_crc32c.py

@@ -18,9 +18,9 @@
 # limitations under the License.
 #
 """Implementation of CRC-32C checksumming as in rfc3720 section B.4.
-See http://en.wikipedia.org/wiki/Cyclic_redundancy_check for details on CRC-32C
+See https://en.wikipedia.org/wiki/Cyclic_redundancy_check for details on CRC-32C
 This code is a manual python translation of c code generated by
-pycrc 0.7.1 (http://www.tty1.net/pycrc/). Command line used:
+pycrc 0.7.1 (https://pycrc.org/). Command line used:
 './pycrc.py --model=crc-32c --generate c --algorithm=table-driven'
 """
 

kafka/util.py

@@ -134,7 +134,7 @@ def __del__(self):
 class WeakMethod(object):
     """
     Callable that weakly references a method and the object it is bound to. It
-    is based on http://stackoverflow.com/a/24287465.
+    is based on https://stackoverflow.com/a/24287465.
 
     Arguments: