Remove last use of CRYPTO_thread_id()

Index: src/ssl.c
--- src/ssl.c.orig
+++ src/ssl.c
@@ -237,7 +237,7 @@ SSL_pthreads_locking_callback(int mode, int type, char
 {
   if( my.debug == 4 ){
     fprintf(
-      stderr,"thread=%4d mode=%s lock=%s %s:%d\n", (int)CRYPTO_thread_id(),
+      stderr,"thread=%4d mode=%s lock=%s %s:%d\n", (int)pthread_self(),
       (mode&CRYPTO_LOCK)?"l":"u", (type&CRYPTO_READ)?"r":"w",file,line
     );
   }
