ok, I found a commit in 2005, coming about because linuxthreads was interfering with the SIGUSR1 signal. It looks like they wound up making it platform specifi

ok, I found a commit in 2005, coming about because linuxthreads was interfering with the SIGUSR1 signal. It looks like they wound up making it platform specific, so BSDs and unix like operating systems might still use SIGUSR1. https://github.com/apache/httpd/commit/395896ae8d19bbea10f82b1d40e16f4721d316b7 https://github.com/apache/httpd/commit/395896ae8d19bbea10f82...