Delta Chat on FreeBSD

Feature Proposal
9

I copy ./target/release/deltachat-rpc-server to /home/user/bin/ and edited src/main/deltachat/stdio_server.ts

  binary_name() {
   ...
    } else if ( p === 'freebsd' && a === 'x64' ) {
      return 'deltachat-rpc-server'
    }

npm install