use pkgconfig of zlib instead of hard requiring it. and link in
the pkg-config libs with --as-needed as not all of the openssl
libs are really required.

instead of having static md5 implemenation, use the openssl
library for digest functions.

and use this option in initramfs, so we are likely to get an usable
environment even if some packages from world are missing. fixes #50.

check for the full filename to match an expected pattern or
delete it (so we delete files with .new, .new.backup, etc.).
final part of remote package caching: fixes #49.

that way we get the same result as the 'apk add world' at boot
time; it might differ from currently installed set (ref #49).

more fine grained control what to load, and rename some of the
flags to be shorter.

printf %i does not work so well with size_t on 64 bit.
Use %zu which seems to be portable enough.

Administrative tool to download or delete files to/from the cache.

If /etc/apk/cache is a symlink to directory, a copy of all installed
packages is stored there, and the index of remote repositories will
be there instead of /var/lib/apk. This enables to reconstruct running
system during boot.

Left as todo: remove cached copy when the package is removed, and
additional apk applet to download missing packages to cache and/or
remove extra items.

And use it in couple of places. Some whitespace fixes too.

And add some more verbosity to the help message.

That will make the upgrade prefer packages available in repositories.
This is good if one want's to downgrade packages by removing an experimental
repository. Or to force re-install of locally built vs. repository version
when the package version are same, but checksum is different. Fixes #51.

Currently just goes through all world dependencies and updates them
where possible (ref #51).

We want be able to compare blobs so we basicly revert the old change,
and make a wrapper that takes version strings.

make apk_version_compare() take strings rather than blobs
add apk_pkgversion_compare(), a wrapper that takes packages

We might want to add an --update-index option to misc applets. For
example:

  apk add --update-index -u package
  apk version --update-index

and re-arrange the order of displayed info

By using a bitmask we can combine subactions

apk --help will list the generic options only and give a list of commands
To get the details for a spefic command, 'apk command --help' should be used.

Support version numbers specified with packages. For example:

 apk add 'busybox<1.14'
 apk add 'squid=>3.0'

since we dont verify the checksum we dont need to calculate it
Speed up when you try fetch lots of stuff thats already there.

We need to close the fd on destruction. This is what the corresponding
istream variant does too.

According the manpage readlink(2) does not append a null byte to buf.
So we have to do it ourselves.

Otherwise the iso image will have softlinks which is not what we want

leftovers from a debug session.

fixes #42

This will also fix a bug that left an empty file in destination dir when
source file did not exist in repository.

There are still issues with paths longer than 255 chars.

So we don't get local modifications or extra files in the tarball.

we should always close the in-stream, not only on failure.

This reverts commit 0906a1c7.

Conflicts:

	src/add.c