[OpenSIPS-Devel] [OpenSIPS/opensips] bb4de4: Be sure we have support for MHD_USE_EPOLL.

[Bogdan Andrei IANCU]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: bb4de46e49904d351c05e5f16ed887edb828a580
      https://github.com/OpenSIPS/opensips/commit/bb4de46e49904d351c05e5f16ed887edb828a580
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2021-08-16 (Mon, 16 Aug 2021)

  Changed paths:
    M modules/httpd/doc/httpd_admin.xml
    M modules/httpd/httpd.c

  Log Message:
  -----------
  Be sure we have support for MHD_USE_EPOLL.

Check if MHD_USE_EPOLL is supported at startup, to be sure we have a proper version of the library.
Closes #2580