[doxygen] Updated to 1.8.17

[tagsemb]

Doxygen 1.8.15 was no longer available from doxygen.nl, updated to current version 1.8.17.

[c72578]

Remark: doxygen files can also be downloaded from sourceforge in subfolders of
https://sourceforge.net/projects/doxygen/files/
e.g.:
https://sourceforge.net/projects/doxygen/files/rel-1.8.17/doxygen-1.8.17.windows.bin.zip

[PhoebeHui]

Thanks for the PR!

[PhoebeHui]

/azp run

[c72578]

@tagsemb maybe you want to work on a separate branch concerning fmt.
Otherwise the commits will appear here in this PR. In general, it is recommended to use a separate branch for each PR and not master.

[tagsemb]

@c72578 Oh I see, thank you, I was not aware.

[tagsemb]

@c72578 Any way I can/should clean up this mess, or is it enough that I don't make the same mistake in the future? I'm new to this, and I cannot find any option to remove commits from the PR now.

[dan-shaw]

@tagsemb We squash the commits in the end so it should be okay if you add a commit to remove those changes. The fmt changes should be separate from the doxygen changes.

[tagsemb]

@dan-shaw Cheers, I've made a reverting commit to my master now that hopefully sets things right, and created a separate pull request on a separate branch for the fmt changes.

[strega-nil]

/azp run

[vicroms]

Thanks for the PR!