Update SSLContext API to have loadTrustedCertificates support lists o…

…f strings

Summary: Adding ability to load a whole vector of certs at once.

Reviewed By: xybu

Differential Revision: D38057061

fbshipit-source-id: a8415176522595cb2db9c935cf5fda40cf33c459

folly/io/async/SSLContext.h

@@ -395,6 +395,17 @@ class SSLContext {
    * @param path Path to trusted certificate file
    */
   virtual void loadTrustedCertificates(const char* path);
+  /**
+   * Load trusted certificates from a vector of file paths
+   *
+   * @param paths container of file paths to trusted certificate files
+   */
+  template <typename StringList>
+  void loadTrustedCertificates(const StringList& paths) {
+    for (const auto& path : paths) {
+      loadTrustedCertificates(path.c_str());
+    }
+  }
   /**
    * Load trusted certificates from specified X509 certificate store.
    *