Bump firmware version to 0x261d0500
Bump firmware version to 0x261d0500

- Raise nwk buffers from 10 to 20
- Backport some routing improvements from Bitcloud 3.3.0

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin