Travis build fails due to missing help pages

[tobiasdiez]

Unit tests that checks for correct help pages currently fails. Thus, we need to add redirects for the old links, and in addition upgrade the links to the new ones.

[koppor]

Would it be OK to just fix the tests? Redirects are much effort. See last paragraph at https://github.com/JabRef/help.jabref.org/issues/76#issuecomment-553632191 Tobias Diez <notifications@github.com> schrieb am Do., 14. Nov. 2019, 00:07:

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[tobiasdiez]

can you make a central redirection of help.jabref.org/whatever to docs.jabref.org with search "whatever"? Otherwise this would render the help functionality of all old JabRef versions useless, and we all know how long users stick to old versions.

[koppor]

I added redirects for all existing pages in JabRef/user-documentation@d599612#diff-d6fddecc411644916195eccfcde4023c this morning 😅.

[koppor]

An arbitrary redirect on GhPages without own CI is only possible with 404: https://github.com/JabRef/contribute.jabref.org/blob/master/README.md (part of the explanation)

[koppor]

Fixed at #5609.