Turn optimizations back on (-O3)

Makefile

@@ -87,7 +87,7 @@ FFF = /etc/redhat-release
 ifneq ($(wildcard $(FFF)),)
 OS_RHEL := true
 STATIC :=
-XMLDOCOPT := -O1
+XMLDOCOPT := -O3
 else
 OS_DEB := true
 # let's remove static now by default to be safe because we don't always
@@ -98,11 +98,11 @@ STATIC := -Wno-misleading-indentation
 # test if this is -O3. strange.
 # Debian Jessie doesn't like -O3, it will core right away when spidering
 # so change this to -O2 from -O3 as well.
-XMLDOCOPT := -O1
+XMLDOCOPT := -O3
 endif
 
 # Onlyjob: -O3 is _very_ unstable and causes segfaults all over (e.g. #172).
-CC_OPT_ARG ?= -O0
+CC_OPT_ARG ?= -O3
 
 
 ifeq ("titan","$(HOST)")