mdnsd v1.1

Changes

• mquery: new -L flag, ignore services on the local host
• libmdnsd: new mdnsd_set_local() and mdnsd_get_local() APIs to ignore
  or allow local services. Backwards-compatible addition

Fixes

• Services on the same host as the querier are discoverable again; regression
  in v1.0 which caused clients such as mquery or mdns-scan, run on the
  device itself, to not see local services
• mdnsd: fix an out-of-bounds memory access when a .service file contains
  a blank line, issue #95