* openssl: upgrade to 1.0.1o (Addressing multiple CVEs)

* install: fix source path for openssl headers (Oguz Bastemur)

* install: make sure opensslconf.h is overwritten (Oguz Bastemur)

* timers: fix timeout when added in timer's callback (Julien Gilli)

* windows: broadcast WM_SETTINGCHANGE after install (Mathias Küsel)