Core: fixed segfault with null in wildcard hash names.

A configuration like

    server { server_name .foo^@; }
    server { server_name .foo; }

resulted in a segmentation fault during construction of server names hash.

Reported by Markus Linnala.
Found with afl-fuzz.
1 file changed
tree: 557e6da9e3ef3bce3d90446f2b7633cc49557f21
  1. auto/
  2. conf/
  3. contrib/
  4. docs/
  5. misc/
  6. src/
  7. .hgtags