src/global/compat_level_convert.in

3.2.1
3.2.1.0
3a.2.1
a3.2.1
3.a2.1
3.2a.1
3.2a.a1
3.2a.1a
3
3.
3.2.
3.1.1.
2
1
0
3.1023
3.1024
3.2.1023
3.2.1024
-3
3.-2.1
3.2.-1