When the password reset function was factored out in 5d31bb24

 (Move reset
key submission to a separate function, 2013-03-19), a semicolon was
accidentally replaced by a concatenation operator. As a result of this,
all password reset emails sent since mid-2013 only contained a password
reset link without any description. Fix this by terminating the
assignment with a semicolon again.

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>