docs(tf2/hl2dm): Add note about unrestricted_maxplayers param (#4783)

lgsm/config-default/config-lgsm/hl2dmserver/_default.cfg

@@ -9,6 +9,8 @@
 #### Game Server Settings ####
 
 ## Predefined Parameters | https://docs.linuxgsm.com/configuration/start-parameters
+# Note that for HL2DM, maxplayers > 33 must be specified like so:
+# maxplayers="101 -unrestricted_maxplayers"
 ip="0.0.0.0"
 port="27015"
 clientport="27005"

lgsm/config-default/config-lgsm/tf2server/_default.cfg

@@ -9,6 +9,8 @@
 #### Game Server Settings ####
 
 ## Predefined Parameters | https://docs.linuxgsm.com/configuration/start-parameters
+# Note that for TF2, maxplayers > 33 must be specified like so:
+# maxplayers="101 -unrestricted_maxplayers"
 ip="0.0.0.0"
 port="27015"
 clientport="27005"