Unhandled exception (6473337e)

Zeus version:
`1.5.2.21b875`

Firefox version:
`(57, 0)`

Geckodriver version:
`geckodriver-v0.19.0-linux64.tar.gz`

Error info:
```Traceback (most recent call last):
File "/home/r0zbot/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/home/r0zbot/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'
```

Running details:
`Linux-5.7.0-kali1-amd64-x86_64-with-debian-kali-rolling`

Commands used:
`zeus.py -d domain:usp.br`

Log file info:
```2020-10-04 17:38:09,654;zeus-log;INFO;log file being saved to '/home/r0zbot/zeus-scanner/log/zeus-log-7.log'
2020-10-04 17:38:09,655;zeus-log;INFO;using default search engine
2020-10-04 17:38:09,656;zeus-log;INFO;starting dork scan with query 'domain:usp.br'
2020-10-04 17:38:09,657;zeus-log;WARNING;will not parse webcache URL's (to parse webcache pass -W)
2020-10-04 17:38:09,657;zeus-log;WARNING;only pulling URLs with GET(query) parameters (to pull all URL's pass -E)
2020-10-04 17:38:09,657;zeus-log;INFO;attempting to gather query URL
2020-10-04 17:38:09,659;zeus-log;INFO;setting up virtual display to hide the browser
2020-10-04 17:38:09,659;zeus-log;ERROR;selenium_search.pyc failed to gather the URL from search engine, caught exception '__init__() got an unexpected keyword argument 'url'' exception has been logged to current log file
Traceback (most recent call last):
File "/home/r0zbot/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/home/r0zbot/zeus-scanner/var/search/selenium_search.py", line 80, in get_urls
ff_display = Display(visible=0, size=(800, 600))
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 34, in __init__
self._obj = self.display_class(
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 52, in display_class
cls.check_installed()
File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 38, in check_installed
ubuntu_package=PACKAGE).check_installed()
TypeError: __init__() got an unexpected keyword argument 'url'

2020-10-04 17:38:15,002;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2020-10-04 17:38:15,003;zeus-log;INFO;getting authorization
2020-10-04 17:38:15,003;zeus-log;INFO;extracting traceback from log file
2020-10-04 17:38:15,004;zeus-log;INFO;attempting to get firefox browser version
```

Start with var/search/selenium_search.py at get_urls around line 80 and inspect the pyvirtualdisplay call shown in the traceback. Reproduce the failure with `zeus.py -d domain:usp.br` in the reported environment, then verify that the search no longer raises the unexpected `url` keyword argument exception.

Written by the indexing model from the issue text.