When downgrading a package or using a substitute with lower version,
the way to do it is adding or increasing PE. For the automatic shlib
dependencies, only the package version without the PE value was
recorded.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>

Now the variables in memory use the PE:PV format, only the *.list
files should store PE#PV so their format it not broken.
The conversion happens when writing a packages' own *.list files
and when reading other packages' files.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>

This reverts commit 1061e76.

This reverts commit 6ba2b98.

When downgrading a package or using a substitute with lower version,
the way to do it is adding or increasing PE. But it didn't help
dependant packages because the shlib records didn't contain PE, only PV.

Let's add the PE value into these records for packages where it's set.

The in-memory variables storing the versions use the PE:PV notation
but the on-disk files must use something else because the : character
is already used as field delimiter in the package.list files storing
these shlib records. Use # instead in the files, so the file format
doesn't change. Conversion occurs on reading/writing the package.list
files.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>

It is used as actual package dependency only if it's not r0,
i.e. it's set.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>

This way we take existing package.list files into account.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>

…oviders()"

This reverts commit 65a3a5e.

This reverts commit 5dee49c.

This reverts commit 559ae2d.

When downgrading a package or using a substitute with lower version,
the way to do it is adding or increasing PE and there may be other
reasons to set PE.

But it doesn't directly help dependant packages because the shlib
records only contain PV.

Let's add the PE value into the shlib records for packages where
it's set and PR unconditionally.

The in-memory variables storing the versions now use the PE:PV
notation but the on-disk files must use something else because
the : character is already used as field delimiter in the package.list
files storing the shlib records. Use # instead in the files,
so the file format doesn't change. Conversion occurs on reading
and writing the package.list files.

v2:

Also store PR in a new 4th field in the shlib records. If it's set,
i.e. it's different from "r0" then it will also be used in the
packages for shared library dependencies.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>