Core: strengthen configuration syntax checker.

It is now a syntax error if tokens passed to a custom configuration
handler are terminated by "{".

The following incorrect configuration is now properly rejected:

  map $v $v2 {
      a b {
      c d {
      e f {
  }
1 file changed
tree: 594652ac7c74cc6d60cc898dbcf59ce63608c5c9
  1. auto/
  2. conf/
  3. contrib/
  4. docs/
  5. misc/
  6. src/
  7. .hgtags