Steps to reproduce:

1. Run zabbix-agent2 on a computer with a filesystem having a space in the label

Result:

With `DebugLevel=4`, we get this message in the log:

2023/05/21 09:02:41.003619 [VfsFs] cannot discern stats for the mount /tmp/_-_-One\040Touch: no such file or directory

Here's `/proc/mounts` (note that the space is escaped as `\040`):

/dev/sdg2 /media/me/One\040Touch exfat rw,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,iocharset=utf8,errors=remount-ro 0 0 

Here's the output of `mount` (note that the actual mountpoint has a space):

/dev/sdg2 on /media/me/One Touch type exfat (rw,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,iocharset=utf8,errors=remount-ro) 

The kernel escapes problematic characters such as " " (ASCII 32) in mountpoint names from `/proc/mounts` (aka `/etc/mtab`)