use warnings;
use strict;

my %data_config;
my $key;
while (<DATA>) {
    chomp;
    if (/(.+?):$/) {
        $key = $1;
    }
    else {
        push @{ $data_config{$key} }, $_; # {updated}
    }
}

print "Host, OS, Version, Hot Fixes, Features\n";
for ( 'Host', 'Kernel', 'Version', 'Hot fixes', 'Enabled Features' ) {
    print "@{$data_config{$_}}, ";
}

__DATA__
Host:
NetDevice1234
Kernel:
Linux 2.6.18-164.11
Version:
Driver 23.4.1 333.0
Hotfix BLD Edition

Hot fixes:
   HF372590
   HF372804
   HF372864
Enabled Features:
FTP 
HTTP
SMTP
Active Directory