pacfile: align output

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
add pu_pathcmp

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
add pu_filelist_contains_path

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacfile: allow paths relative to pacman's root

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacfile: show mtree info if stat fails

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacfile: add --no-check option

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>