add support for `/bin/busybox sh` shebang

src/ShellCheck/Analytics.hs

@@ -590,6 +590,12 @@ prop_checkShebang9 = verifyNotTree checkShebang "# shellcheck shell=sh\ntrue"
 prop_checkShebang10= verifyNotTree checkShebang "#!foo\n# shellcheck shell=sh ignore=SC2239\ntrue"
 prop_checkShebang11= verifyTree checkShebang "#!/bin/sh/\ntrue"
 prop_checkShebang12= verifyTree checkShebang "#!/bin/sh/ -xe\ntrue"
+prop_checkShebang13= verifyTree checkShebang "#!/bin/busybox sh"
+prop_checkShebang14= verifyTree checkShebang "#!/bin/busybox sh\n# shellcheck shell=sh\n"
+prop_checkShebang15= verifyNotTree checkShebang "#!/bin/busybox sh\n# shellcheck shell=dash\n"
+prop_checkShebang16= verifyTree checkShebang "#!/bin/busybox ash"
+prop_checkShebang17= verifyNotTree checkShebang "#!/bin/busybox ash\n# shellcheck shell=dash\n"
+prop_checkShebang18= verifyNotTree checkShebang "#!/bin/busybox ash\n# shellcheck shell=sh\n"
 checkShebang params (T_Annotation _ list t) =
     if any isOverride list then [] else checkShebang params t
   where

src/ShellCheck/Parser.hs

@@ -3238,7 +3238,9 @@ readScriptFile sourced = do
             (first:second:_) ->
                 if basename first == "env"
                     then second
-                    else basename first
+                else if basename first == "busybox"
+                    then second
+                else basename first
 
     verifyShebang pos s = do
         case isValidShell s of