[PATCH v3 2/2] lib: Use email address instead of empty real name.

Currently, if a From-header is of the form: "" the empty string will be treated as a valid real-name, and the entry in the search results will be empty. The new behavior here is that we treat an empty real-name field as if it were null, so that the email address will be used in the search

[PATCH v3 2/2] lib: Use email address instead of empty real name.

Currently, if a From-header is of the form: addr...@example.com the empty string will be treated as a valid real-name, and the entry in the search results will be empty. The new behavior here is that we treat an empty real-name field as if it were null, so that the email address will be