protocol/server: array declarations changed to alloca()
protocol/server: array declarations changed to alloca()

This is to make sure we don't spend CPU cycles in memset(0) on the
array, instead do a 'alloca()' on size of the request.

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster