Ticket #3646: Filtered View doesn't work.
The bug:
1. Go to the source directory for version 4.8.17.
2. Enter the command "ls -l misc/mc*". The output will show at least 7 files.
3. Start mc.
4. Press Meta-! to open the "Filtered View" dialogue box.
5. Enter the same command: "ls -l misc/mc*".
Result:
MC displays the following error:
"ls: cannot access misc/mc*: No such file or directory".
Fix:
(mc_popen): use popen(3) way: pass command to /bin/sh using the -c flag.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>