Unhandled exception (783ab9e4)

Zeus version:
`1.5.2.21b875`

Firefox version:
`failed to start`

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

Error info:
```Traceback (most recent call last):
File "zeus.py", line 333, in
verbose=opt.runInVerbose, forward=opt.forwardedForRandomIP)
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 150, in blackwidow_main
found = crawler.scrape_page_for_links(url)
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 77, in scrape_page_for_links
given_url, agent=self.user_agent, proxy=self.proxy
File "/root/Zeus-Scanner/zeus-scanner/lib/core/common.py", line 335, in get_page
req = requests.get(url, params=headers, proxies=proxies, verify=False, timeout=20)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 473, in send
raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
```

Running details:
`Linux-4.15.0-88-generic-x86_64-with-Ubuntu-18.04-bionic`

Commands used:
`zeus.py -b https://sergiuv.be/movie/pages/series.vue`

Log file info:
```2020-03-25 10:49:07,760;zeus-log;INFO;log file being saved to '/root/Zeus-Scanner/zeus-scanner/log/zeus-log-5.log'
2020-03-25 10:49:07,760;zeus-log;INFO;using default search engine
2020-03-25 10:49:07,760;zeus-log;INFO;starting blackwidow on 'https://sergiuv.be/movie/pages/series.vue'
2020-03-25 10:49:07,820;zeus-log;INFO;connection test succeeded, continuing
2020-03-25 10:49:07,820;zeus-log;INFO;crawling given URL 'https://sergiuv.be/movie/pages/series.vue' for links
2020-03-25 10:49:07,830;zeus-log;ERROR;Zeus has hit an unexpected error and cannot continue, error code '('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))'
Traceback (most recent call last):
File "zeus.py", line 333, in
verbose=opt.runInVerbose, forward=opt.forwardedForRandomIP)
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 150, in blackwidow_main
found = crawler.scrape_page_for_links(url)
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 77, in scrape_page_for_links
given_url, agent=self.user_agent, proxy=self.proxy
File "/root/Zeus-Scanner/zeus-scanner/lib/core/common.py", line 335, in get_page
req = requests.get(url, params=headers, proxies=proxies, verify=False, timeout=20)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 473, in send
raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))

2020-03-25 10:49:28,241;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2020-03-25 10:49:28,241;zeus-log;INFO;getting authorization
2020-03-25 10:49:28,242;zeus-log;INFO;extracting traceback from log file
2020-03-25 10:49:28,242;zeus-log;INFO;attempting to get firefox browser version
2020-03-25 10:49:28,245;zeus-log;ERROR;failed to run firefox
```

Start by running the reported `zeus.py -b https://sergiuv.be/movie/pages/series.vue` command, then inspect `lib/core/common.py` line 335 and its callers in `var/blackwidow/__init__.py` lines 77 and 150. Determine how the reported `requests` `ConnectionError` is handled during crawling; done should be defined by the tool's behavior for this failure instead of the shown unhandled exception.

Written by the indexing model from the issue text.