Force %c to be "%a %Ef %T %Y" to eliminate problems with bad c_fmt

Submitted by:	ru

lib/libc/stdtime/strftime.3

@@ -98,11 +98,11 @@ is replaced by (year / 100) as decimal number; single
 digits are preceded by a zero.
 .It Cm %c
 is replaced by national representation of time and date.
-The format is similar with produced by
+The format is similar to that produced by
 .Xr asctime 3
-and should be
-equivalent to "%a %Ef %T %Y" in fields order and sizes, it
-implies the
+and is
+equivalent to "%a %Ef %T %Y".
+It also implies the
 "3+1+6+1+8+1+4" format of output.
 .It Cm \&%D
 is equivalent to

lib/libc/stdtime/strftime.c

@@ -120,7 +120,8 @@ label:
 					"%02d", pt, ptlim);
 				continue;
 			case 'c':
-				pt = _fmt(Locale->c_fmt, t, pt, ptlim);
+				/* NOTE: c_fmt is intentionally ignored */
+				pt = _fmt("%a %Ef %T %Y", t, pt, ptlim);
 				continue;
 			case 'D':
 				pt = _fmt("%m/%d/%y", t, pt, ptlim);