Fixed wrong variable being passed to registry_rename in vm_rename_instance.

It was passing the name from the input buffer to use as the entry name.
This buffer is rewritten as new hypervisor commands are processed.
This bug is possible because the registry entries are NOT self-contained.

Fixes issue #27 - Rename issues.
Possibility to set the system id for c2691 routers.
Hypervisor commands to get the base MAC address of routers.
Add in the README.hypervisor that the get_mac_addr hypervisor commands
are available since version 0.2.11
Add hypervisor command 'vm clean_delete <instance>'.

Closes issue #26.
Add missing changes to the hypervisor_mode.7 man page.
Make sure IPV6_JOIN_GROUP is defined in cygwin.

Cygwin doesn't have IPV6_JOIN_GROUP anymore. (is copy of IPV6_ADD_MEMBERSHIP)
Bump version to v0.2.11.
Bump version in Makefile to v0.2.12-dev.
Missing space in hypervisor_mode.7 manpage (line 310)
gt96k: more debug info
Fix packet looping on platforms with Gt96k FE.

The specs were not clear on whether the M-bit was a "Miss" or "Match".
It was being treated as a "Match" bit but it turns out IOS treats it
as a "Miss" bit.

Forum-link: http://forum.gns3.net/topic8576.html
Gt96k patch correcting the reporting of processed transmit descriptors back to IOS.

Fixes missing interrupt when gt96k doesn't own the first trasmit descriptor.
Fixes incorrect clearing of the Own bit. (last must wait for transmission, the rest are cleared when processed)
Fixes offset when writing back the cmd word of the non-last descriptors. (missing from 0.2.6-RC3)

Affects c2691, c3725 and c3745.
Fixes issue #29 - packet loss with multicast traffic
Forum-link: http://forum.gns3.net/post26454.html#p26454
Clarify the meaning of the +4 offsets with GT_SDMA_CMD_OFFSET.
Silence forgotten debug message.
Silence forgotten debug message.

This time for real. (forgot to save...)
Change default idlemax value from 1500 to 500.
Add hypervisor command 'vm_debug pmem_cfind'.

Closes issue #31 - create hypervisor command to find a pattern in the router memory
Bump version to v0.2.12.
Bump version to v0.2.13-dev.
MPC860: Add debug message for the unimplemented CP reset command