// a) for "brief" format:
// <mime type> <space separated list of extensions>
// b) for "expanded" format:
-// type=<mime type> \
-// desc="<description>" \
+// type=<mime type> BACKSLASH
+// desc="<description>" BACKSLASH
// exts="<comma separated list of extensions>"
//
+// (where BACKSLASH is a literal '\\' which we can't put here because cpp
+// misinterprets it)
+//
// We try to autodetect the format of mime.types: if a non-comment line starts
// with "type=" we assume the second format, otherwise the first one.