GD (off by default) and TORCH (on by default) were removed in 2.0, the
examples option (off by default) was removed in 2.2.

Required since rspamd 2.0. Even Debian Jessie ships 1.0.0, so add it
unconditionally.

Debian 9 (Stretch) ships with Hyperscan 4.4.1, Ubuntu 18.04 ships with
Hyperscan 4.7.0. Follow rspamd's official recommendation and enable
support for these.

The --parallel option has been supported since 2009 and works perfectly
with CMake, so enable it by default.

[Test] excluding external relay ip example from spf.conf

[Minor] Fix some compiler warnings

[WebUI] Update favicon

[Feature] SPF: Convert external IP to a map

cc1plus: warning: command line option ‘-Wno-pointer-sign’ is valid for C/ObjC but not for C++
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++

[74/340] Building C object contrib/lua-lpeg/CMakeFiles/rspamd-lpeg.dir/lpprint.c.o
In file included from ../contrib/lua-lpeg/lpprint.c:11:
../contrib/lua-lpeg/lptypes.h:15: warning: "NDEBUG" redefined
   15 | #define NDEBUG
      |
<command-line>: note: this is the location of the previous definition
[75/340] Building C object contrib/lua-lpeg/CMakeFiles/rspamd-lpeg.dir/lpcap.c.o
In file included from ../contrib/lua-lpeg/lpcap.h:9,
                 from ../contrib/lua-lpeg/lpcap.c:9:
../contrib/lua-lpeg/lptypes.h:15: warning: "NDEBUG" redefined
   15 | #define NDEBUG
      |
<command-line>: note: this is the location of the previous definition
[77/340] Building C object contrib/lua-lpeg/CMakeFiles/rspamd-lpeg.dir/lpvm.c.o
In file included from ../contrib/lua-lpeg/lpcap.h:9,
                 from ../contrib/lua-lpeg/lpvm.c:15:
../contrib/lua-lpeg/lptypes.h:15: warning: "NDEBUG" redefined
   15 | #define NDEBUG
      |
<command-line>: note: this is the location of the previous definition
[79/340] Building C object contrib/lua-lpeg/CMakeFiles/rspamd-lpeg.dir/lpcode.c.o
In file included from ../contrib/lua-lpeg/lpcode.c:12:
../contrib/lua-lpeg/lptypes.h:15: warning: "NDEBUG" redefined
   15 | #define NDEBUG
      |
<command-line>: note: this is the location of the previous definition
[81/340] Building C object contrib/lua-lpeg/CMakeFiles/rspamd-lpeg.dir/lptree.c.o
In file included from ../contrib/lua-lpeg/lptree.c:15:
../contrib/lua-lpeg/lptypes.h:15: warning: "NDEBUG" redefined
   15 | #define NDEBUG
      |
<command-line>: note: this is the location of the previous definition

../contrib/snowball/compiler/analyser.c: In function ‘check_name_type’:
../contrib/snowball/compiler/analyser.c:210:19: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  210 |         case 'r': if (p->type == t_routine ||
      |                   ^~
../contrib/snowball/compiler/analyser.c:211:54: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  211 |                       p->type == t_external) return; break;
      |                                                      ^~~~~
../contrib/snowball/compiler/analyser.c: In function ‘read_program’:
../contrib/snowball/compiler/analyser.c:859:21: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  859 |                     if (q->used && q->definition == 0) error4(a, q); break;
      |                     ^~
../contrib/snowball/compiler/analyser.c:859:70: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  859 |                     if (q->used && q->definition == 0) error4(a, q); break;
      |                                                                      ^~~~~
../contrib/snowball/compiler/analyser.c:861:21: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  861 |                     if (q->used && q->grouping == 0) error4(a, q); break;
      |                     ^~
../contrib/snowball/compiler/analyser.c:861:68: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  861 |                     if (q->used && q->grouping == 0) error4(a, q); break;
      |                                                                    ^~~~~

Issue #3207

Issue: #3220

[Minor] remove cruft files from webui

[Minor] fix compilation without replxx

[Minor] remove unused examplesdir

[Minor] fix spelling

../src/rspamadm/lua_repl.c: In function ‘rspamadm_lua_run_repl’:
../src/rspamadm/lua_repl.c:615:8: warning: unused variable ‘i’ [-Wunused-variable]
  615 |  gsize i;
      |        ^
../src/rspamadm/lua_repl.c:614:11: warning: unused variable ‘tb’ [-Wunused-variable]
  614 |  GString *tb = NULL;
      |           ^~
../src/rspamadm/lua_repl.c:613:11: warning: unused variable ‘is_multiline’ [-Wunused-variable]
  613 |  gboolean is_multiline = FALSE;
      |           ^~~~~~~~~~~~
../src/rspamadm/lua_repl.c: In function ‘rspamadm_lua’:
../src/rspamadm/lua_repl.c:1007:3: warning: implicit declaration of function ‘replxx_set_max_history_size’ [-Wimplicit-function-declaration]
 1007 |   replxx_set_max_history_size (rx_instance, max_history);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/rspamadm/lua_repl.c:1007:32: error: ‘rx_instance’ undeclared (first use in this function)
 1007 |   replxx_set_max_history_size (rx_instance, max_history);
      |                                ^~~~~~~~~~~
../src/rspamadm/lua_repl.c:1007:32: note: each undeclared identifier is reported only once for each function it appears in
../src/rspamadm/lua_repl.c:1008:3: warning: implicit declaration of function ‘replxx_history_load’ [-Wimplicit-function-declaration]
 1008 |   replxx_history_load (rx_instance, histfile);
      |   ^~~~~~~~~~~~~~~~~~~
../src/rspamadm/lua_repl.c:1010:3: warning: implicit declaration of function ‘replxx_history_save’ [-Wimplicit-function-declaration]
 1010 |   replxx_history_save (rx_instance, histfile);
      |   ^~~~~~~~~~~~~~~~~~~

[Minor] Eliminate redis SMEMBERS usage

[Minor] Dkim_signing: correct is_skip_sign logic

If any of "sign_networks", "auth_only", or "sign_local" are disabled,
then it should not automatically proceed with signing if the enabled
conditions all fail. For example, if only the auth_only setting is
enabled, and is_authed is false, then signing should be skipped.

An earlier check luckily prevents this correctness issue from being
exploitable ("ignoring unauthenticated mail"), but fix the logic anyway.

[Test] Add a test case for URL parsing

Currently it fails because fragment is not extracted correctly.

[Minor] bayes_expiry: Fix type check (https://github.com/antirez/redis/issues/3231)