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* include/httpd.h: Rename CONN_STATE_CHECK_REQUEST_LINE_READABLE to CONN_STATE_KEEPALIVE and CONN_STATE_READ_REQUEST_LINE to CONN_STATE_PROCESS, keeping the old enums as aliases. Rework comments about each state. * server/mpm/event/event.c: Use the new states names. Let the process_connection hooks return CONN_STATE_PROCESS for mpm_event to POLLIN or POLLOUT depending on c->cs->sense being CONN_SENSE_WANT_READ or CONN_SENSE_WANT_WRITE respectively. Remove (ab)use of CONN_STATE_WRITE_COMPLETION with CONN_SENSE_WANT_READ to mean poll() for read (and the need for the obscure c->clogging_input_filters to make it work as expected). This is what CONN_STATE_PROCESS is for now. Update the comment about the states that can be returned by process_connection hooks (and their usage). Use the same queue (process_q renamed from write_completion_q) for polling connections in both CONN_STATE_PROCESS and CONN_STATE_WRITE_COMPLETION states since they both use the same (server_rec's) Timeout. This implies that both states are accounted as "write-completion" in mod_status for now. * server/mpm/motorz/motorz.c, server/mpm/simple/simple_io.c, modules/http/http_core.c: Use the new states names (only). * include/scoreboard.h: Change comment about process_score->write_completion to note that the counter refers to CONN_STATE_PROCESS connections returned to the MPM too. * modules/http2/h2_c1.c: Return the c1 connection with the CONN_STATE_PROCESS state rather than CONN_STATE_WRITE_COMPLETION when waiting for a window update (i.e. ask the MPM to poll for read directly). This avoids the transition to CONN_STATE_KEEPALIVE which could kill the connection under high load. Github: closes #448 git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1918022 13f79535-47bb-0310-9956-ffa450edef68