Circlet and diadem

BUR #34256 has been rejected.

create alias diadem -> circlet

Looking at both the wikis and the posts under both tags, they are indistinguishable. The only difference i can gage is that *maybe* a circlet is supposed to refer to a crown only worn on the forehead, not connected in the back, but there are plenty of posts that circle the head completely in the tag, and the other way around in the diadem tag too. Plus it says in the cirklet wiki it may have the appearance of a bracelet, which does loop around the wrist, likewise then would a circlet loop around the head.

Most of the time you cannot tell either if a diadem or circlet loops around the head or not. In that case the assumption would logically be that diadem would be the default, but the wiki for circlet uses this picture https://danbooru.donmai.us/posts/1450435

When reading the wikipedia of both circlet and diadem it also seems like a semantic/historical difference which would not really be applicable on an anime picture website.

To bring home the point, examples of images tagged as;
Circlet: https://danbooru.donmai.us/posts/8202734, https://danbooru.donmai.us/posts/8059430, https://danbooru.donmai.us/posts/7460542
Diadem: https://danbooru.donmai.us/posts/4194764, https://danbooru.donmai.us/posts/7936768, https://danbooru.donmai.us/posts/4801954

Somewhat related topics: topic #24861 topic #14334

I still think it should be deprecated, not aliased, because no one actually knows what it is and it's going to pollute circlet with tiaras, crowns, and even headbands.

After checking the wikipedia link for diadem, seems like a diadem would be sitting normally where a crown would, while a circlet covers the forehead, so if i'm not wrong, this means diadem is closer to a tiara (the wikipedia article for Tiaras mentionning that

"The word "tiara" is often used interchangeably with the word "diadem""

does make me believe this should be the correct alias BUR)

It also means there is much cleaning to be done in at least all three, as well as some wiki edits

This bulk update request is pending automatic rejection in 5 days.

The bulk update request #34256 (forum #321382) has been rejected by @evazion.

BUR #35594 has been approved by @evazion.

deprecate diadem

Deprecating instead of aliasing. It can be cleaned out manually.

All these tags for "jewelry worn on the head" suffer from people using them interchangeably or randomly. See for example Pyra's headwear getting tagged with tiara, circlet, and headpiece. Or the same type of headband being tagged on one character as headpiece but circlet or tiara on another.

The bulk update request #35594 (forum #330969) has been approved by @evazion.