[jdk13u-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 11u & 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/jdk13u-dev/pull/338/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=338&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/jdk13u-dev/pull/338.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/338/head:pull/338

PR: https://git.openjdk.java.net/jdk13u-dev/pull/338