[asan tests] fix memory leaks

[tests] combine tests into test_common.c

combine common components tests into test_common.c

combine into a single executable to reduce compilation/link redundancy

[multiple] de-dup file and piped loggers (fixes #3101)

de-dup file and piped loggers for error logs and access logs

x-ref:
"RFE: de-dup file and piped loggers"
https://redmine.lighttpd.net/issu

[multiple] de-dup file and piped loggers (fixes #3101)

de-dup file and piped loggers for error logs and access logs

x-ref:
"RFE: de-dup file and piped loggers"
https://redmine.lighttpd.net/issues/3101

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[tests] mv tests from request.t to test_request.c

move some tests from tests/*.t to src/t/test_request.c

[tests] update t/test_request.c

use http_header_request_get() in tests to retrieve request headers

[tests] quite coverity warning in test_request.c

[multiple] quiet some clang-analyzer warnings

[core] http_request_parse_header() specialized

http_request_parse_header() specialized for HTTP/2 request headers
to be parsed as each field-name and value is HPACK-decoded; send headers
directly fr

[core] http_request_parse_header() specialized

http_request_parse_header() specialized for HTTP/2 request headers
to be parsed as each field-name and value is HPACK-decoded; send headers
directly from HPACK decoder, rather than double-buffering in chunkqueue

http_request_headers_process_h2() for post-processing

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[core] move http_request_headers_process()

move http_request_headers_process() to request.[ch]

[tests] use buffer_eq_slen() for str comparison

(substitute buffer_eq_slen() for buffer_is_equal_string())

[multiple] split con, request (very large change)

NB: r->tmp_buf == srv->tmp_buf (pointer is copied for quicker access)

NB: request read and write chunkqueues currently point to connection
chun

[multiple] split con, request (very large change)

NB: r->tmp_buf == srv->tmp_buf (pointer is copied for quicker access)

NB: request read and write chunkqueues currently point to connection
chunkqueues; per-request and per-connection chunkqueues are
not distinct from one another
con->read_queue == r->read_queue
con->write_queue == r->write_queue

NB: in the future, a separate connection config may be needed for
connection-level module hooks. Similarly, might need to have
per-request chunkqueues separate from per-connection chunkqueues.
Should probably also have a request_reset() which is distinct from
connection_reset().

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[core] move addtl request-specific struct members

[core] t/test_request.c using (request_st *)

further isolate t/test_request.c tests to use (request_st *)

[core] rename content_length to reqbody_length

rename content_length to reqbody_length in request,
to more easily differentiate request body length
from response content_length

[core] remove unused request_st member 'request'

[core] pass (request_st *) to request.c funcs

instead of (struct connection *)

[core] pass scheme port to http_request_parse()

con->proto_default_port is a property of the connection,
which influences the default port used in host normalization

[multiple] con->proto_default_port

[multiple] extern log_epoch_secs

replace srv->cur_ts

[multiple] reduce direct use of srv->cur_ts

[multiple] prefer (connection *) to (srv *)

convert all log_error_write() to log_error() and pass (log_error_st *)

use con->errh in preference to srv->errh (even though currently same)

avoid passi

[multiple] prefer (connection *) to (srv *)

convert all log_error_write() to log_error() and pass (log_error_st *)

use con->errh in preference to srv->errh (even though currently same)

avoid passing (server *) when previously used only for logging (errh)

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[core] inline header and env arrays into con

[core] inline buffer as part of data_string value

(instead of value being (buffer *))

[core] remove unused array_reset()

[core] pass ptr to http_request_parse()