QSslCertificate::fromPath uses broken regular expressions which causes it to ignore the path parameter in some cases

commit 20a39c16f236f999cd1694cdc47a3739efcbbfe4
Added a

[^\\]

to the regular expression looking for wildcard symbols to determine the pathPrefix in line 542 of network/ssl/qsslcertificate.cpp

path.indexOf(QRegExp(QLatin1String("[^\\][\\*\\?\\[\\]]")));

This was probably intended to be [^\\\\] as this currently breaks the regular expression by escaping the ].

So a match is made at the first position causing pos in that function to be 0 and always doing the lookup
in the working directory and not in path. This can be extremly nasty as a dirIterator is created on that pathprefix walking over all file names. Depending on your starting directory this can cause the iterator to walk over your complete disk and i experienced extreme delays on Windows.

Example:

  const int idx1 = QString("abcde/*").indexOf(QRegExp(QLatin1String("[^\\][\\*]")));
  qDebug() << "index of unescaped star=" << idx1; // returns 0.