Add headers and fix build

Add more C headers and allow libsb to build correctly with warnings.

src/init/c/util/iso646.h

@@ -0,0 +1,71 @@
+/*
+	<iso646.h> -- macros for use in place of certain tokens that are
+		not expressible in the invariant subset of ISO 646:1991
+
+	This source code has been placed into the PUBLIC DOMAIN by its author.
+
+	last edit:	1999/08/20	gwyn@arl.mil
+
+	Implements subclause 7.9 of ISO/IEC 9899:1999 (E).
+
+	Usage:	??=include <iso646.h>
+
+	Notes:	The C standard has always required that the following
+		source trigraphs be supported in translation phase 1:
+			??= mapped to #
+			??( mapped to [
+			??/ mapped to \
+			??) mapped to ]
+			??' mapped to ^
+			??< mapped to {
+			??! mapped to |
+			??> mapped to }
+			??- mapped to ~
+
+		ISO/IEC 9899:1994 (ISO/IEC 9899:1990/Amendment 1)
+		and subsequently ISO/IEC 9899:1999, which require
+		conforming implementations to provide <iso646.h>,
+		also require support in translation phases 3..4
+		for the following preprocessing tokens:
+			%: alternate spelling for #
+			%:%: alternate spelling for ##
+		They also require support in translation phases 3..7
+		for the following preprocessing tokens:
+			<: alternate spelling for [
+			:> alternate spelling for ]
+			<% alternate spelling for {
+			%> alternate spelling for }
+
+		The C standard also requires that the "difficult"
+		characters be somehow provided in both the basic source
+		and execution character sets, regardless of the
+		provision of trigraph, digraph, and macro alternatives
+		for these characters.  (Thus, the alternate spellings
+		are intended to help programmers, not C implementors.)
+
+		The 1999 revision of the C standard adds support for
+		international characters in identifiers via Universal
+		Character Names, but UCN equivalents are not allowed
+		for the aforementioned "difficult" characters.
+
+		It is suggested that *all* C programmers avoid use of
+		the following identifiers in their programs, in case
+		somebody later needs to use <iso646.h> in maintaining
+		the programs.
+ */
+
+/* This header doesn't need an idempotency lock; there are no typedefs here. */
+
+/* This header doesn't need C++ extern "C"; there are no declarations here. */
+
+#define and	&&
+#define and_eq	&=
+#define bitand	&
+#define bitor	|
+#define compl	~
+#define not	!
+#define not_eq	!=
+#define or	||
+#define or_eq	|=
+#define xor	^
+#define xor_eq	^=