in the lex... even inside quotes, a \ followed by space or tab should

expand to space or tab, and a \ followed by newline should be ignored
(as a line continuation).  compatible with the needs of hoststated
(which has the most strict quoted string requirements), and ifstated
(where one commonly does line continuations in strings).
pointed out by mpf, discussed with pyr

src/usr.sbin/ntpd/parse.y

@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.37 2007/10/13 16:35:21 deraadt Exp $ */
+/*	$OpenBSD: parse.y,v 1.38 2007/10/16 06:06:49 deraadt Exp $ */
 
 /*
  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -454,8 +454,10 @@ yylex(void)
 			} else if (c == '\\') {
 				if ((next = lgetc(quotec)) == EOF)
 					return (0);
-				if (next == quotec)
+				if (next == quotec || c == ' ' || c == '\t')
 					c = next;
+				else if (next == '\n')
+					continue;
 				else
 					lungetc(next);
 			} else if (c == quotec) {