mini_export+=, protect ftp_strjoin, norm,currDir

[Naji-k]

• norminette (Lib, Include,.. and some others)
• project ftp_strjoin(if s2==NULL) not segfault, just return s1 and free it
• env_update_key_value: add new function which can update node in env_list (without delete node and recreate one)
• improve check_curr_dir now works properly