[Feature request] ReAuthor replace by name

[TobiasSekan]

Hello

It is possible to add search and replace by name forgit reauthor ?

$ git reauthor --old-name 'J. F.' --correct-email [email protected] --correct-name 'Jack Foobar'

My problem: After importing repository from old SVN and HG, I miss a few email addresses on different authors and it is replaced by devnull@localhost

Sincerely yours