Blame SOURCES/httpd-2.4.6-mpm-segfault.patch

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--- a/server/mpm/event/event.c  
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+++ a/server/mpm/event/event.c  
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@@ -2735,6 +2735,7 @@ static int event_run(apr_pool_t * _pconf, apr_pool_t * plog, server_rec * s)
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     /* we've been told to restart */
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     apr_signal(SIGHUP, SIG_IGN);
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+    apr_signal(AP_SIG_GRACEFUL, SIG_IGN);
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     if (one_process) {
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         /* not worth thinking about */
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--- a/server/mpm/worker/worker.c
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+++ b/server/mpm/worker/worker.c
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@@ -1902,6 +1902,7 @@ static int worker_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
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     /* we've been told to restart */
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     apr_signal(SIGHUP, SIG_IGN);
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+    apr_signal(AP_SIG_GRACEFUL, SIG_IGN);
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     if (one_process) {
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         /* not worth thinking about */