Upgrade redis.submodule to 6.2.6 (#153)

* Upgrade redis.submodule to 6.2.6

* rerun screwdriver build for PR.

* Remove screwdriver manylinux1 jobs.

The manylinux1 jobs fail due to a transitive dependency on cryptography and cffi libraries, which no longer install on the quay.io/pypa/manylinux1_x86_64 image. The quay.io/pypa/manylinux1_x86_64 image is scheduled to be EOL'd on 2022-01-01 (see: https://web.archive.org/web/20210918193655/https://github.com/pypa/manylinux#manylinux1-centos-5-based---eol).

Remove the manylinux1 jobs in anticipation of their EOL.

* rerun screwdriver build for PR.

build_scripts/update_redis_server.py

@@ -7,7 +7,7 @@
 import tempfile
 
 
-url = 'http://download.redis.io/releases/redis-stable.tar.gz'
+url = 'http://download.redis.io/releases/redis-6.2.6.tar.gz'
 
 
 if __name__ == "__main__":

redis.submodule/.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: Help us improve Redis by reporting a bug
+title: '[BUG]'
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A short description of the bug.
+
+**To reproduce**
+
+Steps to reproduce the behavior and/or a minimal code sample.
+
+**Expected behavior**
+
+A description of what you expected to happen.
+
+**Additional information**
+
+Any additional information that is relevant to the problem.

redis.submodule/.github/ISSUE_TEMPLATE/crash_report.md

@@ -0,0 +1,20 @@
+---
+name: Crash report
+about: Submit a crash report
+title: '[CRASH]'
+labels: ''
+assignees: ''
+
+---
+
+**Crash report**
+
+Paste the complete crash log between the quotes below. Please include a few lines from the log preceding the crash report to provide some context.
+
+```
+```
+
+**Aditional information**
+
+1. OS distribution and version
+2. Steps to reproduce (if any)

redis.submodule/.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,24 @@
+---
+name: Feature request
+about: Suggest a feature for Redis
+title: '[NEW]'
+labels: ''
+assignees: ''
+
+---
+
+**The problem/use-case that the feature addresses**
+
+A description of the problem that the feature will solve, or the use-case with which the feature will be used.
+
+**Description of the feature**
+
+A description of what you want to happen.
+
+**Alternatives you've considered**
+
+Any alternative solutions or features you've considered, including references to existing open and closed feature requests in this repository.
+
+**Additional information**
+
+Any additional information that is relevant to the feature request.

redis.submodule/.github/ISSUE_TEMPLATE/other_stuff.md

@@ -0,0 +1,8 @@
+---
+name: Other
+about: Can't find the right issue type? Use this one!
+title: ''
+labels: ''
+assignees: ''
+
+---

redis.submodule/.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,21 @@
+---
+name: Question
+about: Ask the Redis developers
+title: '[QUESTION]'
+labels: ''
+assignees: ''
+
+---
+
+Please keep in mind that this issue tracker should be used for reporting bugs or proposing improvements to the Redis server.
+
+Generally, questions about using Redis should be directed to the [community](https://redis.io/community):
+
+* [the mailing list](https://groups.google.com/forum/#!forum/redis-db)
+* [the `redis` tag at StackOverflow](http://stackoverflow.com/questions/tagged/redis)
+* [/r/redis subreddit](http://www.reddit.com/r/redis)
+* [the irc channel #redis](http://webchat.freenode.net/?channels=redis) on freenode
+
+It is also possible that your question was already asked here, so please do a quick issues search before submitting. Lastly, if your question is about one of Redis' [clients](https://redis.io/clients), you may to contact your client's developers for help.
+
+That said, please feel free to replace all this with your question :)

redis.submodule/.github/workflows/ci.yml

@@ -0,0 +1,60 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+
+  test-ubuntu-latest:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      # Fail build if there are warnings
+      # build with TLS just for compilation coverage
+      run: make REDIS_CFLAGS='-Werror' BUILD_TLS=yes
+    - name: test
+      run: |
+        sudo apt-get install tcl8.6
+        ./runtest --verbose
+    - name: module api test
+      run: ./runtest-moduleapi --verbose
+
+  build-ubuntu-old:
+    runs-on: ubuntu-16.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      run: make REDIS_CFLAGS='-Werror'
+
+  build-macos-latest:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      run: make REDIS_CFLAGS='-Werror'
+
+  build-32bit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      run: |
+        sudo apt-get update && sudo apt-get install libc6-dev-i386
+        make REDIS_CFLAGS='-Werror' 32bit
+
+  build-libc-malloc:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      run: make REDIS_CFLAGS='-Werror' MALLOC=libc
+
+  build-centos7-jemalloc:
+    runs-on: ubuntu-latest
+    container: centos:7
+    steps:
+    - uses: actions/checkout@v2
+    - name: make
+      run: |
+        yum -y install gcc make
+        make REDIS_CFLAGS='-Werror'