It would be nice to run part of test according to specified tag. I have test cases with many phases and when one of these fails it is impractical to run all phases or comment all useless parts. 

This feature will always run setup and cleanup task, bug will excluded tasks with specified tag.

Example:
========
# cat test.sh
rlJournalStart
   rlPhaseStartSetup
      ...     
   rlPhaseStartTest "TEST 1"
      rlTag "test1"
      ...
   rlPhaseStartTest "TEST 2"
      rlTag "test2"
      ...
   rlPhaseStartCleanup
      ...
rlJournalEnd

# ./test.sh --tag=test1
will be run:
   setup task
   test "TEST 1"
   cleanup task

# ./test.sh --tag=test2
will be run:
   setup task
   test "TEST 2"
   cleanup task

# ./test.sh --tag=all
will be run:
   setup task
   test "TEST 1"
   test "TEST 2"
   cleanup task

Or running of multiple tags:

# ./test.sh --tag=test1+test2
will be run:
   setup task
   test "TEST 1"
   test "TEST 2"
   cleanup task