Disable SHOPT_KIA (ksh -R) by default

SHOPT_KIA enables the -R option that generates a cross-reference
database from a script. However, no tool to analyse this database
is shipped or seems to be available anywhere (in spite of multiple
people looking for one), and the format is very opaque. No usage
examples are known or findable on the internet. This seems like it
should not be compiled in by default, although we'll keep the code
in case some way to use it is found.

src/cmd/ksh93/SHOPT.sh:
- Disable SHOPT_KIA by default by removing the default 1 value.

src/cmd/ksh93/sh/args.c, src/cmd/ksh93/sh/parse.c:
- Fix a couple of preprocessor logic bugs that made it impossible
  to compile ksh without SHOPT_KIA.

src/cmd/ksh93/data/builtins.c:
- Fix typo in -R doc in ksh --man (in case SHOPT_KIA is enabled).

src/cmd/ksh93/sh.1:
- Since sh.1 is not generated dynamically, remove the -R doc.

src/cmd/ksh93/sh/args.c

@@ -117,7 +117,9 @@ int sh_argopts(int argc,register char *argv[], void *context)
 	Shell_t		*shp = (Shell_t*)context;
 	register int	n,o;
 	register Arg_t	*ap = (Arg_t*)(shp->arg_context);
+#if SHOPT_KIA
 	Lex_t		*lp = (Lex_t*)(shp->lex_context);
+#endif
 	Shopt_t		newflags;
 	int setflag=0, action=0, trace=(int)sh_isoption(SH_XTRACE);
 	Namval_t *np = NIL(Namval_t*);

src/cmd/ksh93/sh/parse.c

@@ -39,6 +39,7 @@
 #include	"shlex.h"
 #include	"history.h"
 #include	"builtins.h"
+#include	"path.h"
 #include	"test.h"
 #include	"history.h"
 #include	"version.h"
@@ -93,7 +94,6 @@ static struct argnod	*label_last;
 #define getnode(type)	((Shnode_t*)stakalloc(sizeof(struct type)))
 
 #if SHOPT_KIA
-#include	"path.h"
 /*
  * write out entities for each item in the list
  * type=='V' for variable assignment lists