Update blocknotify.c

Changed sendto to send using TCP so we can control if the block notify produces a connection error.
Added a note about "localhost" usage an possible error 13.
Update blocknotify.c
Merge pull request #56 from bluecircle/master

Fix bug in loading proxy state from redis when key isn't present.
Merge pull request #55 from KaTXi/patch-1

Update blocknotify.c
Fixed stat page erroring when coins were added. Changed default stat update interval to 60 seconds.
Merge remote-tracking branch 'origin/master'
Integers only for yaxis on blocks chart