[5.7] Fix broken email subcopy template escaping

[laurencei]

Laravel 5.6.36 (d3c0a36) introduced a security change to prevent XSS in some situations.

Unfortunately a byproduct of this is a number of breaking changes as documented #25515, #25501, #25408, d3c0a36#commitcomment-30368450, #25716, #25430

One of those breaking changes linked above is email subcopy links do not work out of the box on a fresh Laravel 5.7 install (i.e. email verification subcopy links are broken).

This PR pulls the URL out of the @lang section on the email template, and places it immediately after, allowing the raw url to be un-escaped as required to generate a correct URL. Fixes #25716

Before PR:

After PR:

p.s. if this PR is accepted we'll need to backport to 5.6

[staudenmeir]

@laurencei Now that d3c0a36 got reverted, should we also revert this fix?

[bbashy]

In the Content-Type: multipart/alternative; version of the verify email it's coming out with & in it. The Content-Type: text/plain; one is ok.

Is this to do with this?

http://domain.ext/email/verify/42152?expires=1548326980&signature=5d25ea89b968b2d030af454eb95e8c7bcd599344bb54a4de6431789fd587a578