test concurrent

test initial bisync
bisync resync

test changed on one path - file1
touch-glob 2001-01-02 {datadir/} file5R.txt
touch-glob 2023-08-26 {datadir/} file7.txt
copy-as {datadir/}file5R.txt {path2/} file1.txt

test bisync with file changed during
concurrent-func
bisync

bisync