Permissions are not stored properly in the ZIP archive (QZipReader/QZipWriter)

Bug 1
Permissions QFile::ExeUser and QFile::ExeOwner are not stored properly in the ZIP archive (QZipReader/QZipWriter class)

Consequence: During the decompression of the archive with QZipReader::extractAll() function files and folders lost the attribute QFile::ExeOwner and QFile:ExeUser that is particularly disturbing for folders: extractAll() function failed to decompress files included in sub folder and returns false.

BugFix:
Edit function permissionsToMode() present in file qzip.cpp
Replace the following lines
if (perms & (QFile::ExeOwner | QFile::ExeUser))
mode |= UnixFileAttributes::WriteUser;
By
if (perms & (QFile::ExeOwner | QFile::ExeUser))
mode |= UnixFileAttributes::ExeUser; // BugFix

Note: This function does not affect Qt5.4 because the permissionsToMode() function is coded differently.

Bug 2
Case 1
If you create an archive and add some directories path (like /dir/subdir/subsubdir) without create parent directories before, you get permission wrong on parent directories

zipWriter.setCreationPermissions(QFile::ReadOwner | QFile::WriteOwner | QFile::ExeOwner);
zipWriter.addDirectory("dir/subdir/subsubdir");

--> Extraction work. Only subsubdir will have a chmod 700 and parent directories will have chmod 755.

Case 2
zipWriter.setCreationPermissions(QFile::ReadOwner | QFile::WriteOwner);
QFile file2("ZIP_Spec/2004-04-26_PKZIP_v6.2.0.txt");
zipWriter.addFile("dir2/subdir/subsubdir/file2.txt", &file2);

--> Extraction failed, no directory will be created