Bug#946561: Does not work with python 3.8

["Miguel A. Vallejo" <ea4eoz@gmail.com>]

Hello.

Yesterday I tried to install an HP Laserjet P1102, and when the
program tries to download the plugging, it failed:

 Checking for network connection...
Downloading plug-in from:
Traceback (most recent call last):
  File "/usr/share/hplip/base/password.py", line 84, in get_distro_name
    os_name = platform.dist()[0]
AttributeError: module 'platform' has no attribute 'dist'

I'm not a python expert but it seems platform.dist() is not longer
available in python 3.8. A quick and dirty fix is to edit the file
/usr/share/hplip/base/password.py and around line 84 edit this:

    try:
        os_name = 'debian'
    except AttributeError:
        import distro
        os_name = distro.linux_distribution()[0]

into this

    try:
        #os_name = platform.dist()[0]
        os_name = 'debian'
    except AttributeError:
        import distro
        os_name = distro.linux_distribution()[0]

In this way the plugin downloads and install just fine.

I hope this helps someone.