maxfwd The default value is not 256, it's 16 in the source code.

modules/maxfwd/README

@@ -107,7 +107,7 @@ Chapter 1. Admin Guide
    MAX-FORWARDS value allowed by RFC 3261. The value can be changed at
    runtime.
 
-   Default value is "256".
+   Default value is "16".
 
    Example 1.1. Set max_limit parameter
 ...
@@ -123,7 +123,7 @@ modparam("maxfwd", "max_limit", 32)
    4.5. maxfwd_at_least(max_value)
    4.6. mf_lowlimit(max_value)
 
-4.1.  maxfwd_process(max_value)
+4.1. maxfwd_process(max_value)
 
    If no Max-Forward header is present in the received request, a header
    will be added having the original value equal with "max_value". If a
@@ -158,15 +158,15 @@ if (!maxfwd_process("10") && $retcode==-1) {
 };
 ...
 
-4.2.  mf_process_maxfwd_header(max_value)
+4.2. mf_process_maxfwd_header(max_value)
 
    Same as maxfwd_process(max_value).
 
-4.3.  process_maxfwd(max_value)
+4.3. process_maxfwd(max_value)
 
    Same as maxfwd_process(max_value).
 
-4.4.  is_maxfwd_lt(max_value)
+4.4. is_maxfwd_lt(max_value)
 
    Checks if the Max-Forward header value is less then the "max_value"
    parameter value. It considers also the value of the new inserted header
@@ -197,10 +197,10 @@ if ( is_maxfwd_lt("1") ) {
 };
 ...
 
-4.5.  maxfwd_at_least(max_value)
+4.5. maxfwd_at_least(max_value)
 
    Same as is_maxfwd_lt(max_value).
 
-4.6.  mf_lowlimit(max_value)
+4.6. mf_lowlimit(max_value)
 
    Same as is_maxfwd_lt(max_value).

modules/maxfwd/doc/maxfwd_admin.xml

@@ -78,7 +78,7 @@
 		</para>
 		<para>
 		<emphasis>
-			Default value is <quote>256</quote>.
+			Default value is <quote>16</quote>.
 		</emphasis>
 		</para>
 		<example>