Man pages should mention that XDG_DATA_DIR are used by valac
Submitted by Mikkel Kamstrup Erlandsen
Link to original bug (#620847)
Description
The man page for valac doesn't mention that valac searches $XDG_DATA_DIR for .vapi files as an alternative to --vapidir. This is mighty useful information for people integrating Vala in more dynamic build environments like jhbuild etc...