master branch: fix some "grep" to allow backup of account with similar name

[sfirmery]

[liandros]

Thanks sfirmery . I am part of the team of contributors to zmbkpose project, however I do not have much knowledge of the master branch to make your contribution merge My main contribution has been to add the branch "rewrite_proposal_v2.0". If you think deserves to be tested, you are invited to do so.