Make OpenSSLVersionFinder static methods free functions

Summary:
getOpenSSLNumericVersion was not static, while getOpenSSLLongVersion() was.
Rather than change it to static, these functions should simply be free
functions.

Reviewed By: yfeldblum

Differential Revision: D7094066

fbshipit-source-id: 808a9d169100c9d94d466d9348418a4e8a50c751

folly/ssl/OpenSSLVersionFinder.h

@@ -21,8 +21,9 @@
 // This is used to find the OpenSSL version at runtime. Just returning
 // OPENSSL_VERSION_NUMBER is insufficient as runtime version may be different
 // from the compile-time version
-struct OpenSSLVersionFinder {
-  static std::string getOpenSSLLongVersion() {
+namespace folly {
+namespace ssl {
+inline std::string getOpenSSLLongVersion() {
 #ifdef OPENSSL_VERSION_TEXT
   return SSLeay_version(SSLEAY_VERSION);
 #elif defined(OPENSSL_VERSION_NUMBER)
@@ -30,13 +31,14 @@ struct OpenSSLVersionFinder {
 #else
   return "";
 #endif
-  }
+}
 
-  uint64_t getOpenSSLNumericVersion() {
+inline uint64_t getOpenSSLNumericVersion() {
 #ifdef OPENSSL_VERSION_NUMBER
   return SSLeay();
 #else
   return 0;
 #endif
-  }
-};
+}
+} // namespace ssl
+} // namespace folly