Merge pull request #1087 from gaul/clang-tidy/deprecated-headers

Prefer modern C headers

src/fdcache.cpp

@@ -18,8 +18,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
+#include <cstdio>
+#include <cstdlib>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/time.h>
@@ -28,8 +28,8 @@
 #include <unistd.h>
 #include <pthread.h>
 #include <syslog.h>
-#include <errno.h>
-#include <string.h>
+#include <cerrno>
+#include <cstring>
 #include <dirent.h>
 #include <curl/curl.h>
 #include <string>