Bug#951010: signify and signify-openbsd names

[iandeb@riseup.net]

Package: signify
Version: 1.14-3

Package: signify-openbsd
Version: 28-1

The signify package is inactive since 2003

https://sourceforge.net/projects/signify

Maintaining this package with the current name prevents another software with the same name to be distributed with the name it's known for everywhere, forcing it to be renamed into 'signify-openbsd' in Debian.

signify should be renamed (signify-mail for example) and signify-openbsd should be renamed to signify in order to avoid confusion as signify-openbsd is widely used and known simply as signify everywhere else.