Auxiliary::Web: force vuln proof to_s
Merge remote-tracking branch 'upstream/master' into bug/web-vuln-logging
Auxiliary::Web: updated form of vuln storage in parent

#log_fingerprint and #log_resource now create a key in the
parent's #vulns attribute with the name of the vuln type and
store the details of each such vuln under it.
Merge pull request #1567 from tasos-r7/bug/web-vuln-logging

Web vuln proof forced #to_s