Merge of r5083: fixed potential segfault in keepalive handler.
Fixed potential segfault in ngx_http_keepalive_handler(). In case of error in the read event handling we close a connection by calling ngx_http_close_connection(), that also destroys connection pool. Thereafter, an attempt to free a buffer (added in r4892) that was allocated from the pool could cause SIGSEGV and is meaningless as well (the buffer already freed with the pool).
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@ -2743,6 +2743,7 @@ ngx_http_keepalive_handler(ngx_event_t *rev)
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if (n == NGX_AGAIN) {
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if (ngx_handle_read_event(rev, 0) != NGX_OK) {
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ngx_http_close_connection(c);
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return;
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}
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/*
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