Fix potential memory leak on error

In osdThread.c for POSIX if pthread_create_key fails
In iocLogServer.c if fdmgr_init returns NULL
In dbBkpt.c if semaphore creation fails while adding a bp to a lockset
In devSiSoftCallback.c if linked record is not found

modules/database/src/std/dev/devSiSoftCallback.c

@@ -108,6 +108,7 @@ static long add_record(dbCommon *pcommon)
 
         recGblRecordError(status, (void *)prec,
             "devSiSoftCallback (add_record) linked record not found");
+        free(pdevPvt);
         return status;
     }