Various patches from Bryan that *should* clean up the compile problems

ppl are seeing with v2.0

src/backend/regex/regcomp.c

@@ -47,13 +47,12 @@ static char sccsid[] = "@(#)regcomp.c	8.5 (Berkeley) 3/20/94";
 #include <ctype.h>
 #include <limits.h>
 #include <stdlib.h>
-#include <regex.h>
 
-#include "regex/utils.h"
-#include "regex/regex2.h"
-
-#include "regex/cclass.h"
-#include "regex/cname.h"
+#include <regex/regex.h>   
+#include <regex/utils.h>
+#include <regex/regex2.h>
+#include <regex/cclass.h>
+#include <regex/cname.h>
 
 /*
  * parse structure, passed up and down to avoid global variables and

src/backend/regex/regerror.c

@@ -47,9 +47,9 @@ static char sccsid[] = "@(#)regerror.c	8.4 (Berkeley) 3/20/94";
 #include <ctype.h>
 #include <limits.h>
 #include <stdlib.h>
-#include <regex.h>
 
-#include "regex/utils.h"
+#include <regex/regex.h>
+#include <regex/utils.h>
 
 /* ========= begin header generated by ./mkh ========= */
 #ifdef __cplusplus

src/backend/regex/regexec.c

@@ -54,10 +54,10 @@ static char sccsid[] = "@(#)regexec.c	8.3 (Berkeley) 3/20/94";
 #include <string.h>
 #include <limits.h>
 #include <ctype.h>
-#include <regex.h>
 
-#include "regex/utils.h"
-#include "regex/regex2.h"
+#include <regex/regex.h>
+#include <regex/utils.h>
+#include <regex/regex2.h>
 
 static int nope = 0;		/* for use in asserts; shuts lint up */
 

src/backend/regex/regfree.c

@@ -44,10 +44,10 @@ static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <regex.h>
 
-#include "regex/utils.h"
-#include "regex/regex2.h"
+#include <regex/regex.h>
+#include <regex/utils.h>
+#include <regex/regex2.h>
 
 /*
  - regfree - free everything