[APPROVED] create aliases: gray_* -> grey_*

BUR #2270 has been approved by @evazion.

create alias gray_hat -> grey_headwear
create alias gray_headwear -> grey_headwear
create alias gray_theme -> grey_theme
create alias gray_shirt -> grey_shirt
create alias gray_jacket -> grey_jacket
create alias gray_footwear -> grey_footwear
create alias gray_gloves -> grey_gloves
create alias gray_sweater -> grey_sweater
create alias gray_pants -> grey_pants
create alias gray_shorts -> grey_shorts
create alias gray_panties -> grey_panties
create alias gray_headwear -> grey_headwear
create alias gray_neckwear -> grey_neckwear
create alias gray_hoodie -> grey_hoodie

Reason: The "gray" tags are often aliases to "grey" tags. Existing tags with aliases include grey background, grey bikini, grey_hair, grey_eyes, grey_skirt, etc.

I don't have any preference over using either "gray" or "grey" for all tags. It just seems that "grey" is the single spelling used at the moment. For all I care, they could all be named with "gray" instead.

It just seems nice to have a single "standard" spelling ("grey" in this case) and have the other spelling available too.

All "grey" tags in my list have 900+ posts.

EDIT: The bulk update request #2270 (forum #162876) has been approved by @evazion.

The bulk update request #2270 (forum #162876) has been approved by @evazion.

Grey is British English and gray is American English. Normally we use American English, so technically we should be using gray here, but I don't think changing it would be worth the churn. This will just have to be an exception to the rule.

The tag alias gray_headwear -> grey_headwear has been rejected by @evazion.

gray_headwear -> grey_headwear was aliased twice. I rejected one of the duplicates.