mod_proxy: Don't limit the size of the connectable Unix Domain Socket paths. Since connect() to UDS path is used at several places, introduce ap_proxy_connect_uds() in proxy_util.

Fix computation of the size of 'struct sockaddr_un' when passed to 'connect()'. Use the same logic as the one in ' in 'proxy_util.c'.

Add lots of unique tags to error log messages

great proxy logging cleanup: * remove "proxy:", "FCGI", etc. prefixes and pid which are now included in the error log format * propagate frontend request's logconfig to backend request * use ap_log_rerror where possible * remove obsolete APLOG_NOERRNO

Cleanup effort in prep for GA push: Trim trailing whitespace... no func change

Introduce new function ap_get_conn_socket() to access the socket of a connection

Introduce ap_(get|set)_core_module_config() functions/macros and use them everywhere. We know that the core module has module_index 0. Therefore we can save some pointer operations in ap_get_module_config(cv, &core_module) and ap_set_module_config(cv, &core_module, val). As these are called rather often, this may actually have some (small) measurable effect.

More movement to shared stuff...

Use the new APLOG_USE_MODULE/AP_DECLARE_MODULE macros everywhere to take advantage of per-module loglevels

Fix backward compatibility with APR versions less than 2.0 which don't have apr_socket_wait().

Remove usage of the APR private function apr_wait_for_io_or_timeout(), replacing it with the newly added apr_socket_wait().

simple formatting line-wrap/no functional changes

Use canonical testing

Remove tabs. no functional changes.

Add a declaration check for CMSG_DATA to mod_proxy_fdpass. Also move '#error' after the includes, because it seems CMSG_DATA is commonly defined in sys/socket.h. The check also overwrites _apmod_error_fatal in case CMSG_DATA is not defined to allow building when configure was called with "--enable-proxy". Otherwise one would need to explicitly disable mod_proxy_fdpass. We might want to remove the #error completely, because the new feature test prevents the building of the module when the symbol is not defined.

Use apr_cpystrn instead of strncpy since strncpy can create an unterminated string.

Add configuration of the Flush provider for mod_proxy_fdpass.

Move the provider interface to a separate header file for mod_proxy_fdpass.

Convert the flushing mechanism used before passing the socket to be based on a provider, and include a default one using a flush.

Add a new mod_proxy_fdpass module to pass a client connection off to a separate daemon.