* make config into parameter
* test(new engine): local install test
* test(keys): fix test keys
* complete integration test for local install
* add simple mising mechanism
* fix(alpm): fix callback text
* feat(yay): Add mixed search result
* remove old result structs
* add option for controlling query builder
* only set query builder after parsing args
* add parser args
* update manpage
* write test for results
* write test for results
* mixed source test
* only sort 1 time with every mode
This fixes#1674.
If search command included multiple packages and no results were found
in AUR, response from `query.queryAUR` was returned
as nil slice instead of non-nil empty slice and as nil slice is treated
during subsequent validation in `query.SourceQueryBuilder.Results` as
meaning that searching in AUR was not executed, command was failing.
Now empty non-nil slice is returned if results were not found.
