Greatly improve plugin list, including security-related enhancements

[Gitoffthelawn]

Fix many errors.
Convert links to https when possible.
Remove link to possible malware site.
Fix broken links.
Add missing homepages.
Fix erroneous homepages.
Fix syntax errors
Add missing author credits.
Simplify descriptions and improve consistency.

[MAPJe71]

You forgot to update the pl.x64.json file.

[Gitoffthelawn]

You forgot to update the pl.x64.json file.

Not forgotten. I do not have time to work on it as well. It's for you or others to update that file with the changes made to the x86 file.

[chcg]

@Gitoffthelawn , see failing appveyor check for valid json:
src/pl.x86.json - Expecting ':' delimiter: line 1305 column 3 (char 77170)

What I like:

Fix many errors.
Convert links to https when possible.
Remove link to possible malware site.
Fix broken links.
Add missing homepages.
Fix erroneous homepages.
Fix syntax errors

, but I dislike, mixing all into one commit.

I'm still uncertain on:
Add missing author credits.
, because most likely the authors didn't add their name at the previous corresponding pluginmanager database for some reason.

I don't like the manipulations on the descriptions apart from formatting stuff like spaces, EOL, uppercase/lowercase as that was mostly written be the original authors of the plugins and I think that shouldn't be modified without their ok (at least from the ones still actively working on their plugins).

[Gitoffthelawn]

@Gitoffthelawn , see failing appveyor check for valid json:
src/pl.x86.json - Expecting ':' delimiter: line 1305 column 3 (char 77170)

I don't see an error. Do you? I'm happy to fix it if you see it.

What I like:

Fix many errors.
Convert links to https when possible.
Remove link to possible malware site.
Fix broken links.
Add missing homepages.
Fix erroneous homepages.
Fix syntax errors

, but I dislike, mixing all into one commit.

You're welcome. I understand your concern, but if I made 7 commits, then people would complain about that. I spent several hours on this as a favor, and I don't have more time to spend.

I'm still uncertain on:
Add missing author credits.
, because most likely the authors didn't add their name at the previous corresponding pluginmanager database for some reason.

It doesn't matter to me. All I did was go to the public source code pages and copy pasta'd their names. I'm all for respecting people's privacy, but people intentionally included their names on those public pages or in their code, so I figured it was most likely accidental omissions.

I don't like the manipulations on the descriptions apart from formatting stuff like spaces, EOL, uppercase/lowercase as that was mostly written be the original authors of the plugins and I think that shouldn't be modified without their ok (at least from the ones still actively working on their plugins).

If you have the time, you can ask each one for approval. Many of the descriptions were in broken English and a couple were almost unintelligible. I didn't change the meaning of any of the descriptions; I fixed errors, made them easier to comprehend, and made them easier to translate to other languages. :)

[chcg]

@Gitoffthelawn Thanks for the contribution. After thinking again about it I came to conclusion that the active maintainers could change it back if they don't like it. I will take care on the merge with the x64 version.

[Gitoffthelawn]

You're welcome! :)

And thank you for the merge with the x64 version.