Threw realpath out of buildpath

In contrast to the commandline tool "realpath" the library function
fails for any path pointing to non-existing files (even if the parent
directory exists). This breaks most use-cases for this function.

util/buildpath.c

@@ -4,18 +4,8 @@
 
 char *buildpath(char *root, char *path)
 {
-	char *tmp;
 	if (!path)
 		job_failed("Cannot build path: Value is empty");
-	if (!(root = realpath(root, 0)))
-		job_failed("Building path failed: %s", strerror(errno));
-	tmp = mprintf("%s/%s", root, path);
-	if (!(path = realpath(tmp, 0)))
-		job_failed("Building path failed: %s", strerror(errno));
-	free(tmp);
-	if (strncmp(root, path, strlen(root)))
-		job_failed("Cannot build path: Path points out of root directory");
-	free(root);
-	return path;
+	return mprintf("%s/%s", root, path);
 }