create a symlink to latest netboot release. This is to make it easy to
create urls without version numbers like:
http://dl-cdn.alpinelinux.org/alpine/latest-release/releases/x86_64/netboot

This is in accordance with the discussion on #alpine-devel:

> 14:41 < nmeum> ncopa: is there any reason against just pushing the CVE fix for now [...]?
> 14:42 <@ncopa> will make it more difficult to upgrade to a future 2.9.2 security upgrade

freetype-config was made optional in 2.9.1 but we still enable it since
we don't know for sure if there are any packages out there which
actually use it.

Fixes #8987

Fixes #8982

csync2-compare command requires bash to execute

fixes #8980

fixes #8992

- disable ssh_pass option
- sshd service is enabled form initramfs so remove depends
- remove firstboot from all runlevels. This should only run once
- remove http and ftp support. Require https.

tests fails

build fails with:
src/github.com/hashicorp/vault/vendor/github.com/SAP/go-hdb/internal/protocol/session.go:788:18: undefined: archEndian

the builders does not have git configured so we need provide username and
email

    rsync.c:52:15: error: static declaration of 'strlcpy' follows non-static declaration
     static size_t strlcpy(char *d, const char *s, size_t bufsize)
                   ^~~~~~~
    In file included from csync2.h:33:0,
                     from rsync.c:21:
    /usr/include/string.h:84:8: note: previous declaration of 'strlcpy' was here
     size_t strlcpy (char *, const char *, size_t);
            ^~~~~~~

http://oss.linbit.com/csync2/
Cluster synchronization tool