chore(psk): rename boot_file to init_file

apps/emqx_psk/etc/emqx_psk.conf

@@ -6,14 +6,14 @@ psk {
     ## Whether to enable the PSK feature.
     enable = true
 
-    ## If boot file is specified, emqx will import PSKs from the file 
+    ## If init file is specified, emqx will import PSKs from the file 
     ## into the built-in database at startup for use by the runtime.
     ##
     ## The file has to be structured line-by-line, each line must be in
     ## the format: <PSKIdentity>:<SharedSecret>
-    ## boot_file = {{ platform_data_dir }}/boot.psk
+    ## init_file = {{ platform_data_dir }}/init.psk
 
-    ## Specifies the separator for PSKIdentity and SharedSecret in the boot file.
+    ## Specifies the separator for PSKIdentity and SharedSecret in the init file.
     ## The default is colon (:)
     ## separator = ":"
 }

apps/emqx_psk/src/emqx_psk.erl

@@ -110,7 +110,7 @@ init(_Opts) ->
         true -> load();
         false -> ok
     end,
-    case boot_file() of
+    case init_file() of
         undefined -> ok;
         BootFile -> import_psks(BootFile)
     end,
@@ -145,8 +145,8 @@ code_change(_OldVsn, State, _Extra) ->
 is_enable() ->
     emqx_config:get([psk, enable]).
 
-boot_file() ->
-    emqx_config:get([psk, boot_file], undefined).
+init_file() ->
+    emqx_config:get([psk, init_file], undefined).
 
 separator() ->
     emqx_config:get([psk, separator], ?DEFAULT_DELIMITER).

apps/emqx_psk/src/emqx_psk_schema.erl

@@ -28,7 +28,7 @@ roots() -> [].
 
 fields("psk") ->
     [ {enable,    fun enable/1}
-    , {boot_file, fun boot_file/1}
+    , {init_file, fun init_file/1}
     , {separator, fun separator/1}
     ].
 
@@ -36,9 +36,9 @@ enable(type) -> boolean();
 enable(default) -> false;
 enable(_) -> undefined.
 
-boot_file(type) -> binary();
-boot_file(nullable) -> true;
-boot_file(_) -> undefined.
+init_file(type) -> binary();
+init_file(nullable) -> true;
+init_file(_) -> undefined.
 
 separator(type) -> binary();
 separator(default) -> <<":">>;