The Pidfile directive and ap_log_pid()/ap_remove_pid()/ap_read_pid() now respect DefaultRuntimeDir

Updated event mpm configuration to match the defaults in documentation and header definitions. Updated prefork defaults to better match documentation and header definition.

Update worker mpm defaults to match documentation and built-in defaults. As per https://issues.apache.org/bugzilla/show_bug.cgi?id=52102

Set MaxMemFree 2048 by default

Rename MaxClients to MaxRequestWorkers which describes more accurately what it does.

Rename MaxRequestsPerChild to MaxConnectionsPerChild, which describes more accurately what the directive does. The old name still works but logs a warning.

Add a configuration block for Event MPM. Event is now the default MPM for many platforms, so we should provide an explicit configuration. Discussion for good values to follow.

Replace AcceptMutex, LockFile, RewriteLock, SSLMutex, SSLStaplingMutex, and WatchdogMutexPath with a single Mutex directive. Add APIs to simplify setup and user customization of APR proc and global mutexes. (See util_mutex.h.) Build-time setting DEFAULT_LOCKFILE is no longer respected; set DEFAULT_REL_RUNTIMEDIR instead. Some existing modules, such as mod_ldap and mod_auth_digest gain configurability for their mutexes.

Bring OS/2 MPM back from the dead. Reverses r758899.

remove OS/2 MPM

axe BeOS MPM

Remove LockFile in default config for all MPMs that do not support it (AP_MPM_WANT_SET_LOCKFILE undefined).

Slight fix to r712611: introductory comment should stay above the blocks for the individual MPMs.

Add Simple MPM to example mpm config. Submited by: Ryan Phillips <ryan trolocsis.com>

Unix illustrates a default of 150 max childs, so make winnt mpm consistent with this. (Other mpm's should also be reviewed.)

Quote any file system path that may have spaces when expanded

That's the point, isn't it? All mpm's in one basket?

Some config file changes: - Make the <Files> section safer by adding Satisfy all (as is already present in 1.3) - Remove some handler examples that almost nobody will use (the config file is not the documentation) - Remove some win32 specific stuff from the default config, since win32 uses its own config file - Remove the config section for the perchild mpm

Merged the simple-conf branch changes r159781:160695 into the trunk.