Declare recalc() static
Constify srpd_sys_read_string() arguments
Remove two casts
srp_daemon: Add P_Key support

Set the variable SRP_PKEY in /etc/infiniband/openib.conf or /etc/rdma/rdma.conf
to another value than 0x7fff to use this feature.
Increase version from 0.9.0 to 1.0.0