Reduce oniguruma limits in fuzzing sapi

The defaults are fairly conservative and may still take quite a
bit to match a single expression. Reduce them by a factor of 10x
to speed up fuzzing.

Author: nikic

sapi/fuzzer/fuzzer-sapi.c

@@ -33,7 +33,10 @@ const char HARDCODED_INI[] =
 	"html_errors=0\n"
 	"implicit_flush=1\n"
 	"output_buffering=0\n"
-	"error_reporting=0";
+	"error_reporting=0\n"
+	/* Reduce oniguruma limits by a factor of 10 to speed up fuzzing */
+	"mbstring.regex_stack_limit=10000\n"
+	"mbstring.regex_retry_limit=100000";
 
 static int startup(sapi_module_struct *sapi_module)
 {