Rename from posix to unix to parallel x/sys/unix

Use the `_unix` file suffix to denote *NIX-like semantics in order to parallel the designation given by the package `golang.org/x/sys/unix`.

client/driver/logging/syslog_server.go

@@ -1,86 +0,0 @@
-// +build !windows
-
-package logging
-
-import (
-	"bufio"
-	"log"
-	"net"
-	"sync"
-)
-
-// SyslogServer is a server which listens to syslog messages and parses them
-type SyslogServer struct {
-	listener net.Listener
-	messages chan *SyslogMessage
-	parser   *DockerLogParser
-
-	doneCh   chan interface{}
-	done     bool
-	doneLock sync.Mutex
-
-	logger *log.Logger
-}
-
-// NewSyslogServer creates a new syslog server
-func NewSyslogServer(l net.Listener, messages chan *SyslogMessage, logger *log.Logger) *SyslogServer {
-	parser := NewDockerLogParser(logger)
-	return &SyslogServer{
-		listener: l,
-		messages: messages,
-		parser:   parser,
-		logger:   logger,
-		doneCh:   make(chan interface{}),
-	}
-}
-
-// Start starts accepting syslog connections
-func (s *SyslogServer) Start() {
-	for {
-		select {
-		case <-s.doneCh:
-			s.listener.Close()
-			return
-		default:
-			connection, err := s.listener.Accept()
-			if err != nil {
-				s.logger.Printf("[ERR] logcollector.server: error in accepting connection: %v", err)
-				continue
-			}
-			go s.read(connection)
-		}
-	}
-}
-
-// read reads the bytes from a connection
-func (s *SyslogServer) read(connection net.Conn) {
-	defer connection.Close()
-	scanner := bufio.NewScanner(bufio.NewReader(connection))
-
-	for {
-		select {
-		case <-s.doneCh:
-			return
-		default:
-		}
-		if scanner.Scan() {
-			b := scanner.Bytes()
-			msg := s.parser.Parse(b)
-			s.messages <- msg
-		} else {
-			return
-		}
-	}
-}
-
-// Shutdown shutsdown the syslog server
-func (s *SyslogServer) Shutdown() {
-	s.doneLock.Lock()
-	s.doneLock.Unlock()
-
-	if !s.done {
-		close(s.doneCh)
-		close(s.messages)
-		s.done = true
-	}
-}