add txt to toml

config.toml

@@ -37,7 +37,7 @@ resp_mode=true
 shadow_service=false
 preview_bytes = "1024" #byte
 preview_enabled = true# options send preview header or not
-process_extensions = ["pdf", "zip", "com"] # * = everything except the ones in bypass, unknown = system couldn't find out the type of the file
+process_extensions = ["pdf", "zip", "com","txt"] # * = everything except the ones in bypass, unknown = system couldn't find out the type of the file
 reject_extensions = ["docx"]
 bypass_extensions = ["*"]
 #max file size value from 1 to 9223372036854775807, and value of zero means unlimited