Avoid filling in "old password" fields.

[clemtibs]

When changing passwords on most sites, they usually take input this way:

old password:
new password:
new password again:

Which confuses SGP, which would always fill in all three. Couldn't we easily detect the field name of "old password" and avoid it? Or in more rare situations like this:

password:
new password:
new password:

Just ignore "password" fields if the field name "new password" is present etc.