[Test] Test heic recognition

lualib/lua_magic/patterns.lua

@@ -472,13 +472,13 @@ local patterns = {
         -- HEIC/HEIF file format signature
         -- Starts with ftyp followed by specific brand identifiers
         string = "^....ftyphe[im][cs]",
-        relative_position = 0,
+        position = 12,
         weight = 60,
       },
       {
         -- Alternative signature for HEIC/HEIF
         string = [[^....ftypmif1]],
-        relative_position = 0,
+        position = 12,
         weight = 60,
       },
     }

lualib/lua_magic/types.lua

@@ -284,11 +284,6 @@ local types = {
     ct = 'image/heic',
     av_check = false,
   },
-  heif = {
-    type = 'image',
-    ct = 'image/heif',
-    av_check = false,
-  },
   dwg = {
     type = 'image',
     ct = 'image/vnd.dwg',

test/functional/cases/001_merged/350_magic.robot

@@ -65,3 +65,4 @@ Magic detections bundle 1
   ...  MAGIC_SYM_ICS_55
   ...  MAGIC_SYM_VCF_56
   ...  MAGIC_SYM_CSV_57
+  ...  MAGIC_SYM_HEIC_58

test/functional/messages/gargantua.eml

@@ -23502,4 +23502,58 @@ X-Real-Type: csv
 
 ImZvbyIsImJhciIsImJheiIKIjEiLCIyIiwiMyIK
 
+--XXX
+Content-Type: image/heic
+Content-Transfer-Encoding: base64
+X-Real-Type: heic
+
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+
 --XXX--