Machine can not boot with lvm.conf containing 'command_names = 1' or 'prefix="something"'

Issue

The LVM command_names & prefix configuration parameter are changing the normal lvm command outputs.

However, mkinitrd and iniscripts are known to use LVM command and parse output. Therefore, the 2 parameter shown above will wrongly parse output.
At best, the consequences are warning, at worst, the system wont boot.

In particular, with mkinitrd-5.1.19.6-61.el5_5.1, the machine will not even boot.

The error is as follow :

Parse error at byte 13 (line 1) : unexpected token
Failed to load config file /etc/lvm/lvm.conf
Internal error: _vginfos list should be empty