D27720: Support "img" tag "src" attribute

[Kai Uwe Broulik]

broulik created this revision.
broulik added a reviewer: vkrause.
Herald added a project: KDE PIM.
Herald added a subscriber: kde-pim.
broulik requested review of this revision.

REVISION SUMMARY
  From Mozilla's documentation [1]
  
  > If the element is an […] `img` […] element
  >  The value is the resulting URL string that results from parsing the value of the element's src attribute
  
  [1] https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/itemprop#Values

TEST PLAN
  - I now get hotel images on B&B hotels websites

REPOSITORY
  R1003 KItinerary: Travel Reservation handling library

REVISION DETAIL
  https://phabricator.kde.org/D27720

AFFECTED FILES
  src/generic/structureddataextractor.cpp

To: broulik, vkrause
Cc: kde-pim, fbampaloukas, dcaliste, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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