Remove -u (unbuffered output) option.

With proper flushing happening on idle, this option is obsolete.

bin/varnishlog/varnishlog.c

@@ -80,7 +80,7 @@ openout(int append)
 
 	AN(LOG.w_arg);
 	if (LOG.B_opt)
-		LOG.fo = VSL_WriteOpen(VUT.vsl, LOG.w_arg, append, VUT.u_opt);
+		LOG.fo = VSL_WriteOpen(VUT.vsl, LOG.w_arg, append, 0);
 	else
 		LOG.fo = fopen(LOG.w_arg, append ? "a" : "w");
 	if (LOG.fo == NULL)

bin/varnishlog/varnishlog_options.h

@@ -67,7 +67,6 @@ VUT_OPT_P
 VUT_OPT_q
 VUT_OPT_r
 VSL_OPT_T
-VUT_OPT_u
 VSL_OPT_v
 VUT_OPT_V
 LOG_OPT_w

include/vut.h

@@ -43,7 +43,6 @@ struct VUT {
 	char		*P_arg;
 	char		*q_arg;
 	char		*r_arg;
-	int		u_opt;
 
 	/* State */
 	struct VSL_data	*vsl;

include/vut_options.h

@@ -78,11 +78,6 @@
 	    "Read log in binary file format from this file."		\
 	)
 
-#define VUT_OPT_u							\
-	VOPT("u", "[-u]", "Binary file output unbuffered",		\
-	    "Unbuffered binary file output mode."			\
-	)
-
 #define VUT_OPT_V							\
 	VOPT("V", "[-V]", "Version",					\
 	    "Print version information and exit."			\

lib/libvarnishtools/vut.c

@@ -156,10 +156,6 @@ VUT_Arg(int opt, const char *arg)
 		/* Binary file input */
 		REPLACE(VUT.r_arg, arg);
 		return (1);
-	case 'u':
-		/* Unbuffered binary output */
-		VUT.u_opt = 1;
-		return (1);
 	case 'V':
 		/* Print version number and exit */
 		VCS_Message(VUT.progname);