Certain webpages cause the formation of invalid queries

[weshatheleopard]

I've encountered a webpage that contains a form with the following field:

<input id="searchText" name="" type="text" />

It turns out that build_query method actually builds the query &= out of that field, whereas browsers actually do NOT submit anything for that particular field. Web servers seem to silently ignore such invalid field, but our test framework craps out.

Solution: fields that have blank name should be ignored altogether.