Shared file access flags behavior change in FileOpen

[GicuPiticu]

It seems that FileOpen function has been modified about the way it handles shared file access flags in 3.3.4.0 as opposed to 3.3.2.0.
Maybe it's time for implementing FileOpen modes/flags like OF_SHARE_DENY_NONE and so on.

With code like the folowing... one can't do a "tail" any more on the test.log file while the script is running... because of "File Sharing Violation".
If the script gets compiled/runned by 3.3.2.0 -> no problem....it all started with compiling/running the same script in 3.3.4.0....

$hLogFile=FileOpen("test.log")
While True
;;;do somethin' useful
   FileWrite($hLogFile,"some meaningfull message")
   FileFlush($hLogFile)
;;;more processing
Wend

[Valik]

If the files are now correctly locked... good! They should have been locked from day one but there was some bug I didn't have time to track down which was allowing them to be shared. The fact that they were shared *was* the bug, not that they can no longer be shared. If that "always shared" bug is indeed fixed then I can finally implement proper sharing and file locking (#546).

This is no bug, assuming it's true.