gluster: Fix the recursive goto outs in the source code.

Added a script check_goto.pl, that when run from
the source code root, will scan all .c files to match
the following pattern:

label:
        if (condition)
            goto label;

On finding such a pattern the script will print the file name
and the line number. There are certain cases where the above
recursive pattern is intended. Hence adding those labels to
ignore-labels. Thanks Vijaikumar Mallikarjuna for the perl
script.

Also fixed all such existing errors

Change-Id: I1b821d0a8c296f16e40faff20bd029bdc880c2e9
BUG: 1119256
Signed-off-by: Vijaikumar Mallikarjuna <vmallika@redhat.com>
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/8307
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>