warnings are not shown, but present

If AptToDate fetches warnings from calling `apt-get`, the warnings will be stored internally, but not presented to the user:

`list` for the device:
```
Internals:
.FhemMetaInternals 1
.eventMapCmd Aktualisieren:noArg
CFGFN ./cfg.d/general/network/hosts/hab.cfg
DEF localhost
FUUID 6037825d-f33f-a67d-f0d7-0844bcadabb2d622
FVERSION 42_AptToDate.pm:v1.4.5-s19639/2019-06-18
HOST localhost
NAME general.network.hosts.hab0.packet_manager
NOTIFYDEV global,general.network.hosts.hab0.packet_manager
NR 4149
NTFY_ORDER 50-general.network.hosts.hab0.packet_manager
STATE [general.network.hosts.hab0.packet_manager:updatesAvailable] Updates verfügbar
TYPE AptToDate
VERSION v1.4.5
.attraggr:
.attrminint:
.fhem:
aptget:
cmd repoSync
debug 0
distupgrade 0
host localhost
lang de
packages:
warnings:
HASH(0xd1f1808)
HASH(0xbf8f648)
Helper:
DBLOG:
Aktualisieren:
general.system.log.db:
TIME 1614707867.91424
VALUE fetched warnings
state:
general.system.log.db:
TIME 1614707867.91424
VALUE warnings
READINGS:
2020-12-28 12:21:16 os-release_BUG_REPORT_URL http://www.raspbian.org/RaspbianBugs
2020-12-28 12:21:16 os-release_HOME_URL http://www.raspbian.org/
2020-12-28 12:21:16 os-release_ID raspbian
2020-12-28 12:21:16 os-release_ID_LIKE debian
2020-12-28 12:21:16 os-release_NAME Raspbian GNU/Linux
2020-12-28 12:21:16 os-release_PRETTY_NAME Raspbian GNU/Linux 10 (buster)
2020-12-28 12:21:16 os-release_SUPPORT_URL http://www.raspbian.org/RaspbianForums
2020-12-28 12:21:16 os-release_VERSION 10 (buster)
2020-12-28 12:21:16 os-release_VERSION_CODENAME buster
2020-12-28 12:21:16 os-release_VERSION_ID 10
2020-12-28 12:21:16 os-release_language de
2021-03-02 18:57:47 repoSync fetched warnings
2021-03-02 18:57:47 state warnings
helper:
lastSync 2021-03-02
Attributes:
alias Paketmanager-Status
devStateIcon system.updates.available:security@red system.is.up.to.date:security@green:repoSync .*in.progress:system_fhem_reboot@orange errors:message_attention@red
eventMap repoSync:Aktualisieren
group hab0.home.net
icon debian@black
room Admin->Netzwerk
sortby 100
stateFormat [$name:updatesAvailable] Updates verfügbar
upgradeListReading 1
webCmd Aktualisieren
```

Dump from `%defs`:
```
$VAR1 = {
'HOST' => 'localhost',
'READINGS' => {
'os-release_VERSION_ID' => {
'TIME' => '2020-12-28 12:21:16',
'VAL' => '10'
},
'os-release_SUPPORT_URL' => {
'TIME' => '2020-12-28 12:21:16',
'VAL' => 'http://www.raspbian.org/RaspbianForums'
},
'os-release_NAME' => {
'VAL' => 'Raspbian GNU/Linux',
'TIME' => '2020-12-28 12:21:16'
},
'os-release_BUG_REPORT_URL' => {
'TIME' => '2020-12-28 12:21:16',
'VAL' => 'http://www.raspbian.org/RaspbianBugs'
},
'os-release_ID' => {
'VAL' => 'raspbian',
'TIME' => '2020-12-28 12:21:16'
},
'state' => {
'TIME' => '2021-03-02 18:57:47',
'VAL' => 'warnings'
},
'repoSync' => {
'VAL' => 'fetched warnings',
'TIME' => '2021-03-02 18:57:47'
},
'os-release_language' => {
'VAL' => 'de',
'TIME' => '2020-12-28 12:21:16'
},
'os-release_HOME_URL' => {
'VAL' => 'http://www.raspbian.org/',
'TIME' => '2020-12-28 12:21:16'
},
'os-release_PRETTY_NAME' => {
'VAL' => 'Raspbian GNU/Linux 10 (buster)',
'TIME' => '2020-12-28 12:21:16'
},
'os-release_VERSION' => {
'VAL' => '10 (buster)',
'TIME' => '2020-12-28 12:21:16'
},
'os-release_ID_LIKE' => {
'TIME' => '2020-12-28 12:21:16',
'VAL' => 'debian'
},
'os-release_VERSION_CODENAME' => {
'VAL' => 'buster',
'TIME' => '2020-12-28 12:21:16'
}
},
'.fhem' => {
'aptget' => {
'distupgrade' => 0,
'warnings' => [
{
'message' => "Fehlschlag beim Holen von http://packages.microsoft.com/repos/code/dists/stable/InRelease Tempor\x{c3}\x{a4}rer Fehlschlag beim Aufl\x{c3}\x{b6}sen von \x{c2}\x{bb}packages.microsoft.com\x{c2}\x{ab}"
},
{
'message' => 'Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt.'
}
],
'debug' => 0,
'packages' => {},
'lang' => 'de',
'cmd' => 'repoSync',
'host' => 'localhost'
}
},
'NOTIFYDEV' => 'global,general.network.hosts.hab0.packet_manager',
'NAME' => 'general.network.hosts.hab0.packet_manager',
'DEF' => 'localhost',
'Helper' => {
'DBLOG' => {
'Aktualisieren' => {
'general.system.log.db' => {
'TIME' => '1614707867.91424',
'VALUE' => 'fetched warnings'
}
},
'state' => {
'general.system.log.db' => {
'TIME' => '1614707867.91424',
'VALUE' => 'warnings'
}
}
}
},
'STATE' => '[general.network.hosts.hab0.packet_manager:updatesAvailable] Updates verfügbar',
'.eventMapCmd' => 'Aktualisieren:noArg',
'helper' => {
'lastSync' => '2021-03-02'
},
'.attrminint' => [],
'FVERSION' => '42_AptToDate.pm:v1.4.5-s19639/2019-06-18',
'TYPE' => 'AptToDate',
'NTFY_ORDER' => '50-general.network.hosts.hab0.packet_manager',
'CFGFN' => './cfg.d/general/network/hosts/hab.cfg',
'.attraggr' => [],
'.FhemMetaInternals' => 1,
'VERSION' => 'v1.4.5',
'FUUID' => '6037825d-f33f-a67d-f0d7-0844bcadabb2d622',
'NR' => 4149
};