Lint on pkg/* packages

- pkg/useragent
- pkg/units
- pkg/ulimit
- pkg/truncindex
- pkg/timeoutconn
- pkg/term
- pkg/tarsum
- pkg/tailfile
- pkg/systemd
- pkg/stringutils
- pkg/stringid
- pkg/streamformatter
- pkg/sockets
- pkg/signal
- pkg/proxy
- pkg/progressreader
- pkg/pools
- pkg/plugins
- pkg/pidfile
- pkg/parsers
- pkg/parsers/filters
- pkg/parsers/kernel
- pkg/parsers/operatingsystem

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

proxy/stub_proxy.go

@@ -4,16 +4,25 @@ import (
 	"net"
 )
 
+// StubProxy is a proxy that is a stub (does nothing).
 type StubProxy struct {
 	frontendAddr net.Addr
 	backendAddr  net.Addr
 }
 
-func (p *StubProxy) Run()                   {}
-func (p *StubProxy) Close()                 {}
-func (p *StubProxy) FrontendAddr() net.Addr { return p.frontendAddr }
-func (p *StubProxy) BackendAddr() net.Addr  { return p.backendAddr }
+// Run does nothing.
+func (p *StubProxy) Run() {}
 
+// Close does nothing.
+func (p *StubProxy) Close() {}
+
+// FrontendAddr returns the frontend address.
+func (p *StubProxy) FrontendAddr() net.Addr { return p.frontendAddr }
+
+// BackendAddr returns the backend address.
+func (p *StubProxy) BackendAddr() net.Addr { return p.backendAddr }
+
+// NewStubProxy creates a new StubProxy
 func NewStubProxy(frontendAddr, backendAddr net.Addr) (Proxy, error) {
 	return &StubProxy{
 		frontendAddr: frontendAddr,