Release 6.22.0: Removed obsolete properties from 'ajp.properties' file

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Removed obsolete properties from 'ajp.properties' file:

AJP_CONNECTION_POOL -> Not used anymore
AJP_CONNECTION_POOL_SIZE -> Not used anymore
AJP_REQUEST_HANDLER_POOL -> Not used anymore
AJP_REQUEST_HANDLER_POOL_SIZE -> Not used anymore
AJP_MOD_JK -> Always true
AJP_MAX_NUM_OF_SOCKETS -> Not used anymore
AJP_CHECK_MAGIC_BYTES_STRICT -> Always true