Tom thanks a lot. nobootwait is just what I hoped to find (and additionally in the process I learned about the existance of mountall which now explains some apparently odd behaviour of the mount command

) but UNLUCKILY it does not seem to exist for CIFS:
$this->bbcode_second_pass_code('', 'dmesg | grep boot
[ 216.756778] CIFS: Unknown mount option "nobootwait')
I am ALMOST there with this new /etc/fstab line:
$this->bbcode_second_pass_code('', '//192.168.174.3/rja /mnt/nas-samba cifs credentials=/etc/.smbcredentials,ro,sec=ntlmssp,nounix,nofail,noauto,x-systemd.automount 0 0')
The only BIG problem I keep on getting is that when I do the first
$this->bbcode_second_pass_code('', 'ls -l /mnt/nas-samba')
the directory listing is REALLY messed up and only shows lines like:
$this->bbcode_second_pass_code('', 'drwxr-xr-x 2 root root 0 Oct 14 19:28
drwxr-xr-x 2 root root 0 Oct 14 19:28
drwxr-xr-x 2 root root 0 Oct 14 19:28
drwxr-xr-x 2 root root 0 Oct 14 19:28
drwxr-xr-x 2 root root 0 Oct 14 19:28')
(without the filenames showing and all timestamps are of the UTC moment I issued the ls command)
while is I issue the same command again the directory shows ALMOST perfectly as it should (there's still some confusion over the files timestamps which seem to shift misteriously) such as:
$this->bbcode_second_pass_code('', 'drwxr-xr-x 2 root root 0 Oct 14 17:49 Wolfgang Amadeus Mozart
drwxr-xr-x 2 root root 0 Oct 14 17:49 Wolfgang Amadeus Mozart; Alfred Brendel, Academy of St Martin in the Fields, Sir Neville Marriner
drwxr-xr-x 2 root root 0 Oct 14 17:49 Wolfgang Amadeus Mozart; Bryn Terfel, Rod Gilfry, Cyndia Sieden, Sir John Eliot Gardiner')
Ideas ???