Discourage use of env(1)'s "-" flag by moving its description to the

Compatibility section of the manual page.

usr.bin/env/env.c

@@ -92,6 +92,6 @@ static void
 usage()
 {
 	(void)fprintf(stderr,
-	    "usage: env [-] [-i] [name=value ...] [utility [argument ...]]\n");
+	    "usage: env [-i] [name=value ...] [utility [argument ...]]\n");
 	exit(1);
 }

usr.bin/printenv/printenv.1

@@ -44,7 +44,6 @@
 .Nm
 .Op Ar name
 .Nm env
-.Op Fl
 .Op Fl i
 .Op Ar name Ns = Ns Ar value ...
 .Op Ar utility Oo Ar argument ... Oc
@@ -89,10 +88,6 @@ The environment inherited
 by
 .Nm env
 is ignored completely.
-.It Fl
-Identical to the
-.Fl i
-option, available for backward compatibility.
 .El
 .Pp
 If no utility is specified,
@@ -129,6 +124,13 @@ was found, but could not be executed.
 An exit status of 127 indicates
 .Ar utility
 could not be found.
+.Sh COMPATIBILITY
+The
+.Nm env
+utility accepts the
+.Fl
+option as a synonym for
+.Fl i .
 .Sh SEE ALSO
 .Xr csh 1 ,
 .Xr sh 1 ,