Run client_test as a testcase
  new file
mysql-test-run.sh:
  More clearly report failure if --force, also exit 1
client_test.c:
  Use MAXPATHLEN in test_frm_bug()
  Renable test cases disabled for running from mysql-test-run
mysqltest.c:
  Don't check errno from popen, may not be set


client/mysqltest.c:
  Don't check errno from popen, may not be set
tests/client_test.c:
  Use MAXPATHLEN in test_frm_bug()
  Renable test cases disabled for running from mysql-test-run
mysql-test/mysql-test-run.sh:
  More clearly report failure if --force, also exit 1
mysql-test/t/client_test.test:
  Run client_test as a testcase