Fixed handling whitespaces around '=' in Content-Type/charset token.

[pboguslawski]

Proposed change

This mod allowes Znuny to handle spaces around = in Content-Type/charset
like in message below:

Return-Path: <test@test.loc>
Date: Wed, 30 Apr 2014 12:04:07 +0200
From: test <test@test.loc>
To: <test@test.loc>
Subject: test
MIME-Version: 1.0
Content-Type: text/plain; charset = "utf-8"
Content-Transfer-Encoding: 8bit
Message-ID: <test1003@test.loc>

żółw

Extra spaces are tolerated by http://tools.ietf.org/tools/msglint/
validator (warnings only) and e-mail clients like Mozilla Thunderbird;
Znuny should allow it too to avoid problems (i.e. errors in syslog)
with e-mail messages using spaces as above.

Type of change

• '1 - 🐞 bug 🐞' - Bugfix (non-breaking change which fixes an issue)

Additional information

• Author-Change-Id: IB#1015440

Checklist

• The code change is tested and works locally.(❗)
• There is no commented out code in this PR.(❕)
• You improved or added new unit tests.(❕)
• Local ZnunyCodePolicy run passes successfully.(❕)
• Local unit tests pass.(❕)
• GitHub workflow ZnunyCodePolicy passes.(❗)
• GitHub workflow unit tests pass.(❗)

[rkaldung]

Hi @pboguslawski,

Please follow the contributing guidelines and use the pull request template. And also, please point out if this is a bug fix or a feature.

[rkaldung]

Hi @pboguslawski,

Please follow the contributing guidelines and use the pull request template. And also, please point out if this is a bug fix or a feature.

[pboguslawski]

Done.

[dennykorsukewitz]

Hi @pboguslawski

we have changed our rules regarding copyright.
We therefore ask you to remove your newly added copyrights.

Znuny is an open fork of an existing software.
So we have to respect the already given copyright of the original creators.

New files will be licensed using the AGPL Version 3. 
If you contribute code to the Znuny project you will get mentioned in the pull request incl. the commit, 
in CHANGES.md and in AUTHORS.md. 
We will not mention you in the file you provided or changed. 
Your work is highly appreciated and acknowledged but you contribute it to the project 
and your copyright will pass on to the fork itself.

https://github.com/znuny/Znuny/blob/rel-6_1-dev/CONTRIBUTING.md#licensing-copyright-and-credits

[pboguslawski]

Done.

[dennykorsukewitz]

Hi @pboguslawski ,
thanks for your PR.

Approved 👍

Regards 🚀