Made test more reliable on slow machines


Docs/manual.texi:
  Changelog
client/mysqladmin.c:
  Made --silent more silent
include/my_pthread.h:
  Removed warning on OSF1
mysql-test/install_test_db.sh:
  Allow connections from 127.0.0.1
mysql-test/mysql-test-run.sh:
  Use mysqladmin ping to test if server is up
mysql-test/r/rpl000015.result:
  Added sleep to make results repeatable
mysql-test/t/rpl000015.test:
  Added sleep to make results repeatable
mysql-test/t/rpl000016.test:
  Added sleep to make results repeatable
sql/sql_repl.cc:
  added DBUG entry
sql/sql_table.cc:
  Removed comparison of virtual functions as this didn't work on
  Compaq C++ on OSF1