dnet: simplified dnet_iterator_start()
recovery: fixed recovery script description
recovery: added doc link
tests: cpp: cleaned up range test
tests: cpp: fixed accidental test exit
tests: cpp: added explicit test for remove_data_range
tests: cpp: removed unused code
tests: cpp: simplified range tests
eblob: reformatted range requests
tests: cpp: tests full range for remove range
tests: cpp: removed commented code

We have SCM - no need for commenting code.
tests: cpp: memory test

It's better to use valgrind for that purpose
tests: cpp: removed useless option
tests: cpp: fixed set_ioflags() calls
tests: cpp: removed dududuplication in throw
tests: cpp: moved trivial test case to separate function
tests: cpp: enabled read recovery test
tests: cpp: clear all cache entries in test_cache_delete()
tests: cpp: do not test indexes twice
tests: cpp: removed old range test