virsh: Split cmds to manage domain snapshot from virsh.c

Commands to manage domain snapshot are moved from virsh.c to
virsh-snapshot.c.

* virsh.c: Remove domain snapshot commands.
* virsh-snapshot.c: New file, filled with domain snapshot commands.
* po/POTFILES.in: Add virsh-snapshot.c
* cfg.mk: Skip strcase and config.h including checking for
          virsh-snapshot.c

cfg.mk

@@ -704,7 +704,7 @@ $(srcdir)/src/remote/remote_client_bodies.h: $(srcdir)/src/remote/remote_protoco
 	$(MAKE) -C src remote/remote_client_bodies.h
 
 # List all syntax-check exemptions:
-exclude_file_name_regexp--sc_avoid_strcase = ^tools/virsh(-domain-monitor)?\.c$$
+exclude_file_name_regexp--sc_avoid_strcase = ^tools/virsh(-domain-monitor|-snapshot)?\.c$$
 
 _src1=libvirt|fdstream|qemu/qemu_monitor|util/(command|util)|xen/xend_internal|rpc/virnetsocket|lxc/lxc_controller
 exclude_file_name_regexp--sc_avoid_write = \
@@ -773,7 +773,7 @@ exclude_file_name_regexp--sc_prohibit_xmlURI = ^src/util/viruri\.c$$
 
 exclude_file_name_regexp--sc_prohibit_return_as_function = \.py$$
 
-_virsh_includes=(edit|domain-monitor|domain|volume|pool|network|interface|nwfilter|secret)
+_virsh_includes=(edit|domain-monitor|domain|volume|pool|network|interface|nwfilter|secret|snapshot)
 exclude_file_name_regexp--sc_require_config_h = ^(examples/|tools/virsh-$(_virsh_includes)\.c$$)
 
 exclude_file_name_regexp--sc_require_config_h_first = ^(examples/|tools/virsh-$(_virsh_includes)\.c$$)

po/POTFILES.in

@@ -185,6 +185,7 @@ tools/virsh-network.c
 tools/virsh-nwfilter.c
 tools/virsh-pool.c
 tools/virsh-secret.c
+tools/virsh-snapshot.c
 tools/virsh-volume.c
 tools/virt-host-validate-common.c
 tools/virt-host-validate-lxc.c