Add cpp-httplib to oss-fuzz (#684)

* *Add server fuzzer target  and seed corpus
* Add fuzz_test option to Makefile

* Fix #685

* Try to fix Github actions on Ubuntu

* Added ReadTimeoutSSL test

* Comment out `-fsanitize=address`

* Rebase upstream changes

* remove address sanitizer temporarily

* Add separate Makefile for fuzzing

* 1. Remove special char from dictionary
2. Clean fuzzing/Makefile

* Use specific path to avoid accidently linking openssl version brought in by oss-fuzz

* remove addition of flags

* Refactor Makefile

* Add missing newline

* Add fuzztest to github workflow

* Fix

Co-authored-by: yhirose <yuji.hirose.bug@gmail.com>

.github/workflows/test.yaml

@@ -27,6 +27,9 @@ jobs:
     - name: make
       if: matrix.os != 'windows-latest'
       run: cd test && make
+    - name: check fuzz test target
+      if: matrix.os == 'ubuntu-latest'
+      run: cd test && make -f Makefile.fuzz_test
     - name: setup msbuild on windows
       if: matrix.os == 'windows-latest'
       uses: warrenbuckley/Setup-MSBuild@v1