0e22b224___Configuring_the_Boot_Manager_ubmenu_keywords_in_refind_conf_Possible_parameters
[Token] initrd [Explanation] Sets the filename for a Linux kernel's initial RAM disk (initrd), as described in Table 2. If you want to eliminate the initrd specification, you should use this keyword alone, with no options. You might do this because your main entry is for a Linux kernel with EFI stub support and this submenu entry launches ELILO, which sets the initrd in its own configuration file. [Possible parameters] 
filename
n a m e f o r t h e e n t r y
f i l e n a m e
o n o r o f f
o p t i o n s p a s s e d t o t h e b o o t l o a d e r
n o n e
The rEFInd Boot Manager: Configuring the Boot Manager
Possible parameters