[Minor] Pet luacheck

[Fix] Do not flag pre-result of virus scanners as least if action is reject

fixes #3279

[Feature] allow variables in force_actions messages

'symbol' extractor returns a table
'to_ascii' transform can handle tables

[Minor] Improve lua api

[Minor] use only selectors to fill vars in force_actions message

[Conf] Fix wrong comment in options.inc

Resolve various Compiler warnings

See https://github.com/rspamd/rspamd/issues/3335 for details.

[Minor] Add image/x-ms-bmp CT

../contrib/libev/ev.c: In function ‘ev_io_start’:
../contrib/libev/ev.c:4396:34: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses]
 4396 |   fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
      |                        ~~~~~~~~~~^~~~~~~~~~~~~

../contrib/libev/ev.c: At top level:
../contrib/libev/ev.c:5660:27: warning: "/*" within comment [-Wcomment]
 5660 | /* EV_STAT     0x00001000 /* stat data changed */
      |
../contrib/libev/ev.c:5661:27: warning: "/*" within comment [-Wcomment]
 5661 | /* EV_EMBED    0x00010000 /* embedded event loop needs sweep */
      |

GCC does not respect `(void) func()`

../src/libserver/url.c: In function ‘rspamd_url_host_set_add’:
../src/libserver/url.c:3808:11: warning: variable ‘k’ set but not used [-Wunused-but-set-variable]
 3808 |  khiter_t k;
      |           ^

../src/lua/lua_task.c: In function ‘lua_task_has_urls’:
../src/lua/lua_task.c:2406:11: warning: variable ‘need_emails’ set but not used [-Wunused-but-set-variable]
 2406 |  gboolean need_emails = FALSE, ret = FALSE;
      |           ^~~~~~~~~~~

In file included from ../src/libserver/logger/logger_file.c:23:
../src/libserver/logger/logger_private.h:106:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  106 | const static struct rspamd_logger_funcs file_log_funcs = {
      | ^~~~~
../src/libserver/logger/logger_private.h:130:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  130 | const static struct rspamd_logger_funcs syslog_log_funcs = {
      | ^~~~~
../src/libserver/logger/logger_private.h:154:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  154 | const static struct rspamd_logger_funcs console_log_funcs = {
      | ^~~~~