new libbb func: xmalloc_realpath (+ use it where makes sense)

syslogd, logread: add debugging code (disabled)
syslogs: drastically smaller bss; fix "-C n" behaviour

libbb/xreadlink.c

@@ -4,16 +4,13 @@
  *  Returns a NULL on failure...
  */
 
-#include <stdio.h>
+#include "libbb.h"
 
 /*
  * NOTE: This function returns a malloced char* that you will have to free
  * yourself. You have been warned.
  */
 
-#include <unistd.h>
-#include "libbb.h"
-
 char *xreadlink(const char *path)
 {
 	enum { GROWBY = 80 }; /* how large we will grow strings by */
@@ -36,3 +33,16 @@ char *xreadlink(const char *path)
 
 	return buf;
 }
+
+char *xmalloc_realpath(const char *path)
+{
+#ifdef __GLIBC__
+	/* glibc provides a non-standard extension */
+	return realpath(path, NULL);
+#else
+	char buf[PATH_MAX+1];
+
+	/* on error returns NULL (xstrdup(NULL) ==NULL) */
+	return xstrdup(realpath(path, buf));
+#endif
+}