multicast/mc_cmds: Some cleanup

* Fix a typo.
* Delete 'trace_logic' that is used to debug.
* Use 'test.sh' script and use 'tst_*' instead of 'end_testcase'.
* Use 'tst_check_cmds' to check 'netstat'.
* Delete some unuseful comments.
* Upgrade the approach of obtain 'Iface'. In some system the 'Iface' may be
  like 'p2p1'. We could not obtain the expected 'Iface' by the old approach.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
multicast/mc_commo: Some cleanup

* Delete 'trace_logic' that is used to debug.
* Use 'test.sh' script and use 'tst_*' instead of 'end_testcase'.
* Use 'tst_check_cmds' to check 'rsh' and 'netstat'.
* Delete some unuseful comments.
* Fix old-style function definition in 'mc_recv.c' and 'mc_send.c'.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
multicast/mc_member: Some cleanup

* Move 'ManyGroups' and 'TooManyGroups' to the new directory of 'datefile'.
  And install them into '$LTPROOT/testcases/data'.
* Delete 'trace_logic' that is used to debug.
* Use 'test.sh' and use 'tst_*' instead of 'end_testcase'.
* Use 'tst_check_cmds' to check 'netstat'.
* Delete some unuseful comments.
* Rename 'member.c' to 'mc_member_test.c' and some cleanup.
* Fix old-style function definition in "mc_member_test.c".
* Modify Makefile.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
multicast/mc_opts: Some cleanup

* Rename 'opts.c' to 'mc_verify_opts.c' and some cleanup.
* Rename 'opts_e.c' to 'mc_verify_opts_error.c' and some cleanup.
* Delete 'trace_logic' that is used to debug.
* Use 'test.sh' script and use 'tst_*' instead of 'end_testcase'.
* Delete some unuseful comments.
* Fix old-style function definition.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>