Fix support for zstd-1.3.[23]

Summary:
* One function needed renaming
* One bug needed to be worked around (content size defaulting to 0)

Reviewed By: yfeldblum

Differential Revision: D8264565

fbshipit-source-id: 1abe5fb79b525108e64857dc28d5582372fcc165

folly/compression/Zstd.cpp

@@ -232,7 +232,12 @@ Options::Options(int level) : params_(ZSTD_createCCtxParams()) {
   if (params_ == nullptr) {
     throw std::bad_alloc{};
   }
+#if ZSTD_VERSION_NUMBER >= 10304
   zstdThrowIfError(ZSTD_CCtxParams_init(params_.get(), level));
+#else
+  zstdThrowIfError(ZSTD_initCCtxParams(params_.get(), level));
+  set(ZSTD_p_contentSizeFlag, 1);
+#endif
 }
 
 void Options::set(ZSTD_cParameter param, unsigned value) {

folly/compression/test/CompressionTest.cpp

@@ -1376,7 +1376,6 @@ TEST(ZstdTest, CustomOptions) {
   auto test = [](const DataHolder& dh, unsigned contentSizeFlag) {
     unsigned const wlog = 23;
     zstd::Options options(1);
-    options.set(ZSTD_p_nbWorkers, 3);
     options.set(ZSTD_p_contentSizeFlag, contentSizeFlag);
     options.set(ZSTD_p_checksumFlag, 1);
     options.set(ZSTD_p_windowLog, wlog);