commit 7001394

Replace non-UTF8 chars with the Unicode replacement character

tcell does not handle non-UTF8 chars well, so we explicitly replace them
when getting the messages to avoid passing them to tcell down the line.

 1@@ -4,6 +4,8 @@ import (
 2 	"bufio"
 3 	"fmt"
 4 	"net"
 5+	"strings"
 6+	"unicode"
 7 )
 8 
 9 const chanCapacity = 64
10@@ -16,6 +18,7 @@ func ChanInOut(conn net.Conn) (in <-chan Message, out chan<- Message) {
11 		r := bufio.NewScanner(conn)
12 		for r.Scan() {
13 			line := r.Text()
14+			line = strings.ToValidUTF8(line, string([]rune{unicode.ReplacementChar}))
15 			msg, err := ParseMessage(line)
16 			if err != nil {
17 				continue