When reaching the hard-coded limit to JSON scope stack size, return ENOMEM

instead of aborting.

kcgijson.h

@@ -39,6 +39,10 @@ enum	kjsontype {
 	KJSON_STRING
 };
 
+/*
+ * The maximum number of JSON scopes allowed.
+ * Once this has been reached, new scopes will return KCGI_ENOMEM.
+ */
 #define	KJSON_STACK_MAX	128
 
 struct	kjsonscope {

man/kjson_array_open.3

@@ -72,7 +72,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with

man/kjson_obj_open.3

@@ -72,7 +72,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with

man/kjson_string_open.3

@@ -73,7 +73,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with