Use explicit_bzero() when clearing sslpassword in libpq
Since 74a308c, any security-sensitive information gets cleared from
memory this way. This was forgotten in 4dc6355.
Author: Daniel Gustafsson
Reviewed-by: Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/935443ba-d42e-4ce0-
Use explicit_bzero
Use the explicit_bzero() function in places where it is important that
security information such as passwords is cleared from memory. There
might be other places where it could be useful; this is just an
initial collection.
For platforms that don't have explicit_bzero(), provi
