Apache 2.2.11

When the ap_http_header_filter processes an error bucket, cleanup the passed brigade before returning AP_FILTER_ERROR down the filter chain;
error responses set by filters were being coerced into 500 errors, sometimes appended to the original error response;
don't reject libtool 2.x;
add configuration option to insert string in HTML HEAD (IndexHeadInsert);
add new LogFormat parameter, %k, which logs the number of keepalive requests on this connection for this request;
export and install the mod_rewrite.h header to ensure the optional rewrite_mapfunc_t and ap_register_rewrite_mapfunc functions are available to third party modules;
convert age of cached object to seconds before comparing it to age supplied by the request when checking whether to send a Warning header for a stale response;
correctly set SSL_LIBS during openssl detection if pkgconfig is not available;
do not fail if response data is sent before all request data is read;
add in forced recovery for balancer members if all are in error state;
prevent segmentation faults by correctly adjusting the lifetime of the buckets read from the proxy backend;
do not sets negative max-age / Expires header in the past;
was displaying the wrong value for the KeepAliveTimeout value;
fix wrongly formatted requests where client sets Content-Length header, but doesn't provide a body;
add ap_timeout_parameter_parse to public API;
add the possibility to set the worker parameters connectiontimeout and ping in milliseconds;
crosscheck that idle workers are still available before using them and thus preventing an overflow of the worker queue which causes a SegFault;
always build the odbc dbd driver on windows, to be consistent with the apr-util default

Release Date: Dec 15, 2008