Linter errors fixes

src/core/core.go

@@ -20,7 +20,6 @@ import (
 // The Core object represents the Mesh node. You should create a Core
 // object for each Mesh node you plan to run.
 type Core struct {
-
 	// This is the main data structure that holds everything else for a node
 	// We're going to keep our own copy of the provided config - that way we can
 	// guarantee that it will be covered by the mutex

src/core/link_mpath.go

@@ -108,6 +108,8 @@ func (l *linkMPATH) handler(dial *linkDial, name string, info linkInfo, conn net
 }
 
 // Returns the address of the listener.
+//
+//nolint:unused
 func (l *linkMPATH) getAddr() *net.TCPAddr {
 	// TODO: Fix this, because this will currently only give a single address
 	// to multicast.go, which obviously is not great, but right now multicast.go

src/core/link_mpath_linux.go

@@ -31,6 +31,7 @@ func (t *linkMPATH) tcpContext(network, address string, c syscall.RawConn) error
 	return nil
 }
 
+//nolint:unused
 func (t *linkMPATH) getControl(sintf string) func(string, string, syscall.RawConn) error {
 	return func(network, address string, c syscall.RawConn) error {
 		var err error

src/core/link_sctp_linux.go

@@ -153,6 +153,8 @@ func (l *linkSCTP) handler(dial *linkDial, name string, info linkInfo, conn net.
 }
 
 // Returns the address of the listener.
+//
+//nolint:unused
 func (l *linkSCTP) getAddr() *net.TCPAddr {
 	// TODO: Fix this, because this will currently only give a single address
 	// to multicast.go, which obviously is not great, but right now multicast.go