Add most robust handling of message output

I'll admit to being completely stymied by ASCII vs. UTF vs. Unicode
handling in Python2 and Python3.  I got a report of issues writing
the output, so put in some code to handle exceptions and try different
techniques.  I thought I had put this issue to rest.

If writing the output in the encoding of sys.stdout doesn't work,
try writing the output in UTF8, and then with no encoding.
One of these should work...(shouldn't it?)

I'm basically just taking stabs in the dark here.

grabserial

@@ -484,7 +484,14 @@ def grab(arglist, outputfd=sys.stdout):
                     if outputfd:
                         outputfd.write(msg)
                 if out:
-                    out.write(msg.encode(sys.stdout.encoding))
+                    try:
+                        out.write(msg.encode(sys.stdout.encoding))
+                    except:
+                        try:
+                            out.write(msg.encode("utf8"))
+                        except:
+                            out.write(msg)
+
                 prev1 = elapsed
                 newline = 0
 
@@ -497,7 +504,14 @@ def grab(arglist, outputfd=sys.stdout):
                 if not quiet:
                     outputfd.write(msg)
                 if out:
-                    out.write(msg.encode(sys.stdout.encoding))
+                    try:
+                        out.write(msg.encode(sys.stdout.encoding))
+                    except:
+                        try:
+                            out.write(msg.encode("utf8"))
+                        except:
+                            out.write(msg)
+
                 prev1 = elapsed
                 newline = 0
 
@@ -575,7 +589,13 @@ def grab(arglist, outputfd=sys.stdout):
             outputfd.write(msg)
             outputfd.flush()
         if out:
-            out.write(msg.encode(sys.stdout.encoding))
+            try:
+                out.write(msg.encode(sys.stdout.encoding))
+            except:
+                try:
+                    out.write(msg.encode("utf8"))
+                except:
+                    out.write(msg)
             out.flush()
 
     if out: