Bug#619545: pvcreate: man page should list dataalignment default

[Tomas Pospisek]

Matt Taggart wrote on 24 Mar 2011:

[snip]
The vgcreate(8) man page does list a default of 4 MB for
--physicalextentsize but does it really use that as the default always

FWIW: it does as of lvm 2.02.95-8/wheezy
*t