#2 config_df and fetch_df fails on logical volume names

[Jozsef Marton]

logical volume device names contain dash (-), and they are not filtered on muninlite-side.
This makes for munin master impossible to recognise the data point the value stands for.

Also, df splits lines with too lond device names.

eg. of a problematic df outpuf:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VG00-LV00
10127604 3888784 5724364 41% /
/dev/hda1 101086 8483 87384 9% /boot
/dev/mapper/vg1-lv1
57798908 44234384 12390120 79% /mnt/etc
none 2097208 0 2097208 0% /dev/shm

config_df and fetch_df should be adjusted when calculating value for variable PNAME as follows:

PNAME=$(echo $PINFO | cut -d\ -f1 | sed 's/[\/.-]/_/g')

[Jozsef Marton]

Logged In: YES
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calls to df should be replaced by call to "df -P" when iterating through PARTitions and when calculating PINFO. Both fetch_df and config_df should be adjusted.