main: create directories before writing pidfile

This makes it possible to save pidfile in /var/run/chrony.

main.c

@@ -530,9 +530,6 @@ int main
   /* Check whether another chronyd may already be running */
   check_pidfile();
 
-  /* Write our pidfile to prevent other chronyds running */
-  write_pidfile();
-
   if (!user)
     user = CNF_GetUser();
 
@@ -543,6 +540,9 @@ int main
   /* Create directories for sockets, log files, and dump files */
   CNF_CreateDirs(pw->pw_uid, pw->pw_gid);
 
+  /* Write our pidfile to prevent other instances from running */
+  write_pidfile();
+
   PRV_Initialise();
   LCL_Initialise();
   SCH_Initialise();