This is the second part of the change mentioned here:

  http://thread.gmane.org/gmane.comp.emulators.libvirt/10331

It removes the essentially redundant "optname" parameter
from each of the vshCommandOptNetworkBy and vshCommandOptDomainBy
functions as well as the correspond macros (without "By" suffix).
Now, instead of always passing the optname, "domain", to
vshCommandOptDomainBy, that function requires that its command
argument refer to an opts array containing a "domain" option.

This normalization makes one more help-related change:
it renames the net-start "name" argument to the more
sensible and consistent "network".
* src/virsh.c (VSH_BYNAME, vshCommandOptDomain)
(cmd_has_option): New function, used in vshCommandOptDomainBy
and vshCommandOptNetworkBy.
(vshCommandOptDomainBy, vshCommandOptNetworkBy): Remove the optname
parameter, it's always "domain" ("network").  Update all callers.
Call cmd_has_option.
(vshCommandOptNetwork, cmdAutostart, cmdConsole, cmdDomstate)
(cmdDomblkstat, cmdDomIfstat, cmdSuspend, cmdUndefine, cmdStart)
(cmdSave, cmdSchedinfo, cmdDump, cmdResume, cmdShutdown)
(cmdReboot, cmdDestroy, cmdDominfo, cmdVcpuinfo, cmdVcpupin)
(cmdSetvcpus, cmdSetmem, cmdSetmaxmem, cmdDumpXML, cmdDomname)
(cmdDomid, cmdDomuuid, cmdMigrate, cmdNetworkAutostart)
(cmdNetworkDestroy, cmdNetworkDumpXML, cmdNetworkName)
(opts_network_start, cmdNetworkStart, cmdNetworkUndefine)
(cmdNetworkUuid, cmdVNCDisplay, cmdTTYConsole, cmdAttachDevice)
(cmdDetachDevice, cmdAttachInterface, cmdDetachInterface)
(cmdAttachDisk, cmdDetachDisk, cmdEdit)
* src/Makefile.am (virsh-pool-edit.c): This code is generated
from cmdEdit, and cmdEdit uses the vshCommandOptDomain macro which
now, with the changes above, has only 3 (was 4) arguments, yet the
macro use is mapped to vshCommandOptPool, which still requires 4
arguments.  So this change adjusts the sed code to reinsert the
just-removed argument -- we're not changing pool-related code right
now, because it's not as straight-forward.