0e712b3812 Make DynSock accepted sockets queue optional, with precise lifetime (Matthew Zipkin)
3de02abf3f util/test: Add string_view constructor to LineReader and remove StringToBuffer (Matthew Zipkin)
b0ca400612 string: replace AsciiCaseInsensitiveKeyEqual with CaseInsensitiveEqual (Matthew Zipkin)
8172099293 util: get number of bytes consumed from buffer by LineReader (Matthew Zipkin)
Pull request description:
This is a follow-up to #34242 and is the first few commits of #32061
As review and refinement of the replacement HTTP server progresses, some new utilities were needed and added. This PR updates those utilities as work continues on #32061.
### LineReader
In order to enforce strict limits on the total size of headers in HTTPRequest, we add a method to `LineReader` to give us the total amount of data that has been read from the buffer so far. See https://github.com/bitcoin/bitcoin/pull/32061#discussion_r2949287329
### CaseInsensitiveEqual
HTTP headers are case-insensitive. An early version of #32061 used an unordered_map for this and therefore we needed a comparator struct. However that unordered_map was replaced by a simpler `std::vector` of `std::pair` so we can remove the struct and use methods that already exist in the codebase.
### StringToBytes
`StringToBuffer` was introduced in #34242 to test LineReader but review of #32061 indicated that it would be more optimal to return a span of bytes instead of a vector. See https://github.com/bitcoin/bitcoin/pull/32061#discussion_r2892431378
### Split DynSock constructor for two usecases: listening / accepting sockets
See https://github.com/bitcoin/bitcoin/pull/32061#discussion_r2895891437. DynSock was introduced in #30988 and is not used anywhere in master yet. If it's used as a listening socket, it provides connected sockets. If it's used as a connected socket, it provides I/O pipes. By making the queue of connected sockets optional we can clean up the ownership / lifetime if the class members.
ACKs for top commit:
fjahr:
Code review ACK 0e712b3812
vasild:
ACK 0e712b3812
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