(main, termio): Add the ability to set the username.

Get it from environment variable LOGNAME if set,
else get the user name from the system.

(main) [_DWIN32]: Add stdin redirection ability to the Win32 port.
The client reads until stdin redirection empty and then terminates.

man/emp_client.6

@@ -14,7 +14,7 @@ empire \- Empire client
 .BI \-k
 ]
 [
-.BI \-2\ outfile
+.BI \-2 outfile
 ]
 .br
 .SH DESCRIPTION
@@ -38,7 +38,7 @@ the password for your country in the game
 .BI \-k
 if someone else is connected to your country, kill their connection
 .TP
-.BI \-2\ outfile
+.BI \-2 outfile
 redirect output to 
 .I outfile
 .SH ENVIRONMENT VARIABLES
@@ -51,6 +51,8 @@ you should have the right default already.)
 setenv COUNTRY country-name (optional)
 .PP
 setenv PLAYER representative-name (optional)
+.PP
+setenv LOGNAME username (optional)
 .SH AUTHORS
 .nf
 Primary Author is Dave Pare (mr-frog@scam.berkeley.edu)