[skip ci] Restore ssp_fuzz.cpp, update fuzzing duration, add fuzz bedge to README

fuzz/makefile

@@ -5,4 +5,4 @@ all:
 	${CXX} ${SRC} -fsanitize=fuzzer -std=c++17 -o ${BIN}
 
 run:
-	./${BIN} -max_total_time=300
+	./${BIN} -max_total_time=600

fuzz/ssp_fuzz.cpp

@@ -77,9 +77,5 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     test_ssp<escape, quote, multiline_r, trim>(data, size);
     test_ssp<escape, quote, multiline_r, trim, ss::ignore_empty>(data, size);
 
-    if (size > 10) {
-        throw "...";
-    }
-
     return 0;
 }