user_url field length should be increased

Default user_url field length in wp_users table should be increased.

Use case: LinkedIn user profile urls may contain non-ascii user names in utf-8 where each non-ascii character will take at least 6 bytes url-encoded. Example: cyrillic small letter а becomes %D0%B0.
Current length is 100 so the url may not contain more than 15 non-ascii characters which is a serious and unnecessary restriction.

Suggested new length: 200.