LP#1526543 Truthiness check for reset_password is flawed

LP#1526543 Truthiness check for reset_password is flawed

We expect boolean options in config.tt2 to be 'true' or 'false',
but the code was simple asking 'IF reset_password', which is true
for either value.

Instead, match on the string (as we do in other places).

To test:
- Load the stock catalog login page
- Notice the "Forgot your password?" link staying no matter which way
  'reset_password' is set in config.tt2
- Apply patch, and change 'reset_password' value in config.tt2 to 'false'
- RESULT: Password reset link doesn't show up

Signed-off-by: Dan Wells <dbw2@calvin.edu>
Signed-off-by: Remington Steed <rjs7@calvin.edu>
Signed-off-by: Ben Shum <bshum@biblio.org>