Skip unparsable urls

[frankier]

I get problems with some image urls when using news-please:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/newsplease/crawler/commoncrawl_extractor.py", line 259, in _
_process_warc_gz_file
    filter_pass, article = self.filter_record(record)
  File "/opt/coviddash/ingress/covidmarch.py", line 24, in filter_record
    passed_filters, article = super().filter_record(warc_record, article)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/crawler/commoncrawl_extractor.py", line 123, in f
ilter_record
    article = self._from_warc(warc_record)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/crawler/commoncrawl_extractor.py", line 235, in _
from_warc
    return NewsPlease.from_warc(record, decode_errors="replace" if self.__ignore_unicode_errors else "stric
t", fetch_images=self.__fetch_images)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/__init__.py", line 55, in from_warc
    article = NewsPlease.from_html(html, url=url, download_date=download_date, fetch_images=fetch_images)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/__init__.py", line 95, in from_html
    item = extractor.extract(item)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/pipeline/extractor/article_extractor.py", line 63
, in extract
    article_candidate = extractor.extract(item)
  File "/usr/local/lib/python3.7/dist-packages/newsplease/pipeline/extractor/extractors/newspaper_extractor
.py", line 33, in extract
    article.parse()
  File "/usr/local/lib/python3.7/dist-packages/newspaper/article.py", line 261, in parse
    self.fetch_images()
  File "/usr/local/lib/python3.7/dist-packages/newspaper/article.py", line 272, in fetch_images
    imgs = self.extractor.get_img_urls(self.url, self.clean_doc)
  File "/usr/local/lib/python3.7/dist-packages/newspaper/extractors.py", line 570, in get_img_urls
    for url in urls])
  File "/usr/local/lib/python3.7/dist-packages/newspaper/extractors.py", line 570, in <listcomp>
    for url in urls])
  File "/usr/lib/python3.7/urllib/parse.py", line 511, in urljoin
    urlparse(url, bscheme, allow_fragments)
  File "/usr/lib/python3.7/urllib/parse.py", line 368, in urlparse
    splitresult = urlsplit(url, scheme, allow_fragments)
  File "/usr/lib/python3.7/urllib/parse.py", line 435, in urlsplit
    raise ValueError("Invalid IPv6 URL")
ValueError: Invalid IPv6 URL
ERROR:newsplease.crawler.commoncrawl_extractor:Unexpected error: <class 'ValueError'> (Invalid IPv6 URL)