Hans-Christoph Steiner ba028408a1 registerMDNSService() overwrites any existing registration
There is only ever a single service to advertise via mDNS, so when a new
registration is requested, remove any existing ones.  This should eliminate
these stacktraces:

java.lang.IllegalStateException: A service information can only be registered with a single instamce of JmDNS.
    at javax.jmdns.impl.JmDNSImpl.registerService(JmDNSImpl.java:1005)
    at org.fdroid.fdroid.localrepo.LocalRepoService$5.run(LocalRepoService.java:239)
    at java.lang.Thread.run(Thread.java:856)
2014-05-30 15:23:32 -04:00
..