Corrige l'url et supprime les branches de plusieurs sous-modules

sea, serverguide, shutdown, signs_lib, snow, soccer, soundset, spears,
sponge, sprint, stacktraceplus, stained_glass

.gitmodules

@@ -256,51 +256,39 @@
 [submodule "sea"]
 	path = sea
 	url = https://sys4.fr/gitea/mff/minetest-mod-sea.git
-	branch = master
 [submodule "serverguide"]
 	path = serverguide
 	url = https://sys4.fr/gitea/mff/serverguide.git
-	branch = master
 [submodule "shutdown"]
 	path = shutdown
 	url = https://sys4.fr/gitea/mff/shutdown.git
-	branch = master
 [submodule "signs_lib"]
 	path = signs_lib
 	url = https://sys4.fr/gitea/mff/signs_lib.git
-	branch = master
 [submodule "snow"]
 	path = snow
 	url = https://sys4.fr/gitea/mff/minetest-mod-snow.git
-	branch = master
 [submodule "soccer"]
 	path = soccer
-	url = https://sys4.fr/gitea/nalc/soccer.git
-	branch = mff
+	url = https://sys4.fr/gitea/mff/minetest-soccer.git
 [submodule "soundset"]
 	path = soundset
-	url = https://sys4.fr/gitea/nalc/soundset.git
-	branch = master
+	url = https://sys4.fr/gitea/mff/soundset.git
 [submodule "spears"]
 	path = spears
 	url = https://sys4.fr/gitea/mff/spears.git
-	branch = master
 [submodule "sponge"]
 	path = sponge
 	url = https://sys4.fr/gitea/mff/sponge.git
-	branch = master
 [submodule "sprint"]
 	path = sprint
-	url = https://sys4.fr/gitea/nalc/sprint.git
-	branch = master
+	url = https://sys4.fr/gitea/mff/sprint.git
 [submodule "stacktraceplus"]
 	path = stacktraceplus
-	url = https://sys4.fr/gitea/nalc/stacktraceplus.git
-	branch = master
+	url = https://sys4.fr/gitea/mff/stacktraceplus.git
 [submodule "stained_glass"]
 	path = stained_glass
 	url = https://sys4.fr/gitea/mff/stained_glass.git
-	branch = master
 [submodule "throwing"]
 	path = throwing
 	url = https://sys4.fr/gitea/mff/throwing.git