fixing r.binary as a key
changing key ordering so that binary sorts as a pseudotype, and fixed pseudotype ordering in datum_t::cmp
fixing secondary key format for common prefixes - this breaks sindex compatibility with previous versions
adding test for index sorting
fixing test-runner for using a running server instance
remove redundancy in an error message
Fix changefeed multi-disconnection bug.
Changed a map iterator to a pointer to pair.
Merge branch 'mlucy_2761_changefeed_fixes_2' into next
Merge branch 'next' into grey_binary_sindex

Conflicts:
	test/rql_test/src/math_logic/comparison.yaml
Merge branch 'grey_binary_sindex' into next
adding index_rename to the server
adding index_rename to the drivers
adding index_rename polyglot tests
adding sindex rename unit test
fixing comment typo
Convert query_params to a map
Merge pull request #2812 from gsathya/query_params

Convert query_params to a map
Convert header_lines into a map

Also, add a add_header_line() to http_req_t
removing an extra import form a merge glitch

reviewed over-the-shoulder by danielmewes