[jdk11u-dev] RFR: 8273655: content-types.properties files are missing some common types

[Andrew John Hughes]

Hi all,

This pull request contains a backport of commit [65ed0a74](https://github.com/openjdk/jdk/commit/65ed0a742e65fe7e661e8da2adea6cd41992869e) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.  

The commit being backported was authored by Julia Boes on 21 Sep 2021 and was reviewed by Brian Burkhalter and Daniel Fuchs.

This is a clean update of the OpenJDK mime types which has already been backported to 17u.  The risk of extending the list of recognised types is low and will enable OpenJDK to correctly identify more file types.

Thanks!

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Commit messages:
 - Backport 65ed0a742e65fe7e661e8da2adea6cd41992869e

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/1007/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1007&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273655
  Stats: 227 lines in 3 files changed: 193 ins; 13 del; 21 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/1007.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/1007/head:pull/1007

PR: https://git.openjdk.java.net/jdk11u-dev/pull/1007