Description of problem:

Volume option, "nfs.enable-ino32" behaving as a global option for all volumes instead providing a single volume for setting the volume option,

[root@node1 ~]# gluster volume set test nfs.enable-ino32 on
volume set: success

[root@node1 ~]# gluster volume info |grep "nfs.enable-ino32"
nfs.enable-ino32: on
nfs.enable-ino32: on
nfs.enable-ino32: on
nfs.enable-ino32: on

Version-Release number of selected component (if applicable):
all

How reproducible:
Always

Steps to Reproduce
1. Create a few volumes, type does not matter
2. Set the volume option, 

    # gluster v set test nfs.enable-ino32 on


Actual results:
Volume option is setting as a global option for all the volume's.

Expected results:
Volume option should set for single volume.

Additional info:
The change that is needed would be similar to the "nfs.disable" option. The enable_ino32 boolean will need to move from the nfs_state structure to nfs3_state. nfs3_iatt_gfid_to_ino() can then get a 2nd argument "gf_boolean ino32".

I see this as an EasyFix, a new contributor should be able to implement the changes.