www/{nginx,nginx-devel,freenginx}: 3rd-party modules management

Move the bundled fdintino nginx-upload-module to release 2.3.0 and work
around its PCRE2 incompatibility.

Since the removal of the PCRE1 option nginx is built against PCRE2 only.
The module's regex filter for upload_pass_form_field still tests the
ngx_regex_exec() return code for "rc == 0", which is only true under
PCRE1; PCRE2 returns the number of captures (>= 0) on a match, so
matching
form fields were silently dropped and upload_pass_form_field was
unusable
on any dynamic (DSO) build. Relax the test to "rc >= 0" (workaround
from
upstream pull request 152).

freenginx: additionally adapt the module to the removal of r->start_sec
in freenginx >= 1.29 (nginx_version >= 1029000), which is otherwise a
build failure.

PR: 271781
Sponsored by: Netzkommune GmbH