smtp: rename readByteLine to readDataBlock for #98.

Update change log.

CHANGELOG.md

@@ -4,12 +4,20 @@ Change Log
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+
+## [Unreleased]
+
+### Added
+- SMTP TLS support (thanks kingforaday.)
+
+
 ## [v2.0.0] - 2018-05-05
 
 ### Changed
 - Corrected docs for INBUCKET_STORAGE_PARAMS (thanks evilmrburns.)
 - Disabled color log output on Windows, doesn't work there.
 
+
 ## [v2.0.0-rc1] - 2018-04-07
 
 ### Added

pkg/server/smtp/handler.go

@@ -402,7 +402,7 @@ func (s *Session) mailHandler(cmd string, arg string) {
 // DATA
 func (s *Session) dataHandler() {
 	s.send("354 Start mail input; end with <CRLF>.<CRLF>")
-	msgBuf, err := s.readByteLine()
+	msgBuf, err := s.readDataBlock()
 	if err != nil {
 		if netErr, ok := err.(net.Error); ok {
 			if netErr.Timeout() {
@@ -471,8 +471,8 @@ func (s *Session) send(msg string) {
 	}
 }
 
-// readByteLine reads a line of input, returns byte slice.
-func (s *Session) readByteLine() ([]byte, error) {
+// readDataBlock reads message DATA until `.` using the textproto pkg.
+func (s *Session) readDataBlock() ([]byte, error) {
 	if err := s.conn.SetReadDeadline(s.nextDeadline()); err != nil {
 		return nil, err
 	}
@@ -486,7 +486,7 @@ func (s *Session) readByteLine() ([]byte, error) {
 	return b, err
 }
 
-// Reads a line of input
+// readLine reads a line of input respecting deadlines.
 func (s *Session) readLine() (line string, err error) {
 	if err = s.conn.SetReadDeadline(s.nextDeadline()); err != nil {
 		return "", err