fix[#1979]: Increment Email validation

[fvckDesa]

solves issues #1979, #1515 and #1435

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[colinhacks]

Looks great, thanks!

[Tyler-Murphy]

This only gets part of #1435 I think, since it still doesn't allow IP addresses without square brackets around the IP address, e.g. someone@123.123.123.123. Only someone@[123.123.123.123] is allowed by the new regex here.

[ggmartins091]

This also leaves some cases of emails that are valid but fail the validation, when the domain has a subdomain and a number on the domain name, for example:

test@any.th1ng.com (INVALID)
test@any.thing.com (valid)

/^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\])|(\[IPv6:(([a-f0-9]{1,4}:){7}|::([a-f0-9]{1,4}:){0,6}|([a-f0-9]{1,4}:){1}:([a-f0-9]{1,4}:){0,5}|([a-f0-9]{1,4}:){2}:([a-f0-9]{1,4}:){0,4}|([a-f0-9]{1,4}:){3}:([a-f0-9]{1,4}:){0,3}|([a-f0-9]{1,4}:){4}:([a-f0-9]{1,4}:){0,2}|([a-f0-9]{1,4}:){5}:([a-f0-9]{1,4}:){0,1})([a-f0-9]{1,4}|(((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2}))\.){3}((25[0-5])|(2[0-4][0-9])|(1[0-9]{2})|([0-9]{1,2})))\])|([A-Za-z0-9]([A-Za-z0-9-]*[A-Za-z0-9])*(\.[A-Za-z]{2,})+))$/.test('email@health.all4you.com')

[ggmartins091]

@colinhacks @fvckDesa fyi

[fvckDesa]

@ggmartins091 Yes, the problem is here:

([A-Za-z0-9]([A-Za-z0-9-]*[A-Za-z0-9])*(\.[A-Za-z]{2,})+)

As soon as I can I try to fix it