* Support for kernel up to 5.13
* support for debug information from libdebuginfod
* finished support for map elements items_*_batch() APIs
* add atomic_increment() API
* support attach_func() and detach_func() in python
* fix displaying PID instead of TID for many tools
* new tools: kvmexit.py
* new libbpf-tools: gethostlatency, statsnoop, fsdist and solisten
* fix tools ttysnoop/readahead for newer kernels
* doc update and bug fixes