#995253 lintian: uses-dpkg-database-directly triggered on comments in script

#995253#5
Date:
2021-09-28 14:55:08 UTC
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I have a sample output of `apt-cache policy $PACKAGE` in my script
comments:
```
    #   Installed: 2.0.8
    #   Candidate: 2.0.10
    #   Version table:
    #       2.0.10 500
    #           500 https://deb...com/apt/debian bionic/main arm64 Packages
    #           500 https://deb...com/apt/debian bionic/main armhf Packages
    #   *** 2.0.8 100
    #           100 /var/lib/dpkg/status
```

Lintian is triggered by the last line. If i change `dpkg` to `_dpkg` in
it, the warning uses-gpkg-database-directly is gone.

The script first line is `#!/bin/sh`