Fix regressions after ba98b55:
- Unable to override filetype autodetection by setting a specific filetype
for specific files, i.e. this doesn't work:
"*.h": {
"filetype": "c++"
},
- Unable to enable/disable syntax highlighting for specific files,
i.e. this doesn't work:
"*.c": {
"syntax": false
},
- "readonly" setting doesn't work (neither global nor per-filetype).
de8f4bf72f