RFC 2616 defines headers as case-insensitive, so if rpc is behind a
reverse proxy that lowers the case of headers, transmission will not
parse them correctly.
A new wrapper function, `tr_strcasestr` is added to
libtransmission/utils.c to allow for comparisons of headers case
insensitively, and checks in cmake and autogen are included.
* applied changes from https://github.com/Elbandi/transmission/tree/elbandi/labels to official transmission repo
* Fix compilation errors
* Address review comments
Changed `tr_ptrArray* labels` to `tr_ptrArray labels`;
Removed tr_ptrArrayNew() tr_ptrArrayDup() tr_ptrArrayFree()
Use tr_strsep() to split string by delimiters
Update transmission-remote.1
Update rpc-spec.txt
* Fix warning, address comments
* Rebase, fix formatting and address comments
Use uncrustify to format changed files
Fix "const <type>" -> "<type> const"
Fix small comments
* Lock torrent for setLabels, check for duplicates
* Check for empty labels in daemon
* Stop on first error
