Synchronize KartTeam and 'temporary teams', add a few spectate modes

Both KartTeam and temporary teams are still present, but now ServerLobby ensures
that their values correspond to each other. In particular:
 - you can use commands on temporary teams also on soccer/ctf teams now
 - you can change the set of available teams in racing/ffa with /availableteams
 - when changing from racing/ffa to soccer/ctf, /randomteams 2 is done
 - when changing from soccer/ctf to racing/ffa, teams are cleared
 - unlike standard implementation, soccer team is not just "not sent", it is
   defined as KART_TEAM_NONE in racing/ffa
 - you can set an absent team in soccer/ctf, but that will trigger a new
   ASM_NO_TEAM spectate mode, which goes away if the mode becomes racing/ffa
 - as another spectate mode was added, I also added /spectate 2 which allows
   you to skip games but also not watch them. Yes, it goes against the command
   name, but sometimes it's really needed. Without arguments /spectate still
   goes between 0 and 1.
 - probably something else was done, I forgot already. Hoping nothing crashes

Author: kimden

NETWORKING.md

@@ -391,6 +391,9 @@ A typical current server configuration xml that fits the current code version is
     <!-- Specifies how the server should decide which map vote wins in map selection. 0 corresponds to standard system, 1 - to randomly selecting one of votes. -->
     <map-vote-handling value="0" />
 
+    <!-- Codes of teams initially available on the server. Format is any subset of rbygopcms (the teams currently available). You can change it from the lobby using hammer command(s), and this will be overridden during soccer and ctf modes. -->
+    <available-teams value="rbygopcms" />
+
 </server-config>
 ```
 

data/commands.xml

@@ -39,9 +39,9 @@ here later. For now, please refer to the code for the strings being used. -->
         />
     </command>
     <command name="spectate"
-             usage="/spectate [0 | 1]"
+             usage="/spectate [0 | 1 | 2]"
              permissions-verbose="everyone"
-             description="Toggles autospectate mode."
+             description="Toggles autospectate mode. 0 corresponds to normal mode, 1 - to spectating mode, 2 - to staying permanently in the lobby and not watching."
     />
     <command name="addons"
              usage="/addons [type]"
@@ -1129,6 +1129,21 @@ here later. For now, please refer to the code for the strings being used. -->
              permissions="UP_EVERYONE"
              state-scope="SS_LOBBY"
     />
+    <command name="availableteams"
+             usage="/availableteams"
+             permissions-verbose="everyone"
+             description="Shows which teams are available on the server. When the mode is soccer or CTF, there are always red and blue teams; in that case, the command shows what will be available in case the mode is changed."
+             permissions="UP_EVERYONE"
+             state-scope="SS_LOBBY"
+    >
+        <command name="="
+                 usage="/availableteams (all, or string of chars rbygopcms which can be empty if quoted)"
+                 omit-name="true"
+                 permissions-verbose="hammers"
+                 description="Allows to set which teams will be available (when the mode is soccer or CTF, acts for the next time when the mode changes to something else)."
+                 permissions="UP_HAMMER"
+        />
+    </command>
     <command name="addondownloadprogress"
              usage="/addondownloadprogress"
              permissions-verbose="everyone (client command)"

src/network/game_setup.cpp

@@ -193,7 +193,10 @@ void GameSetup::sortPlayersForGame(
         return;
     for (unsigned i = 0; i < players.size(); i++)
     {
+        // The same as ServerLobby::setTeamInLobby, but without server lobby.
+        // Checks for spectate modes are not needed here.
         players[i]->setTeam((KartTeam)(i % 2));
+        players[i]->setTemporaryTeam(TeamUtils::getIndexFromKartTeam(i % 2));
     }
 }   // sortPlayersForGame
 

src/network/network_player_profile.hpp

@@ -96,7 +96,7 @@ class NetworkPlayerProfile
         m_handicap.store((HandicapLevel)0);
         m_local_player_id       = 0;
         m_team.store(team);
-        m_temporary_team        = 0;
+        m_temporary_team        = TeamUtils::getIndexFromKartTeam(team);
         resetGrandPrixData();
     }
     // ------------------------------------------------------------------------
@@ -116,7 +116,7 @@ class NetworkPlayerProfile
         m_local_player_id       = local_player_id;
         m_team.store(team);
         m_country_code          = country_code;
-        m_temporary_team        = 0;
+        m_temporary_team        = TeamUtils::getIndexFromKartTeam(team);
         resetGrandPrixData();
     }
     // ------------------------------------------------------------------------
@@ -150,7 +150,7 @@ class NetworkPlayerProfile
     // ------------------------------------------------------------------------
     float getDefaultKartColor() const
     {
-        if (m_temporary_team == 0)
+        if (m_temporary_team == TeamUtils::NO_TEAM)
             return m_default_kart_color;
         return TeamUtils::getTeamByIndex(m_temporary_team).getColor();
     }