wg-meta attributes with no value are not handled correctly

[sirtoobii]

Consider the following configuration example where #+ is our wg-meta prefix:

[Peer]
PublicKey = WG_0_PEER_A_PUBLIC_KEY
#A normal comment
AllowedIPs = fdc9:281f:04d7:9ee9::1/128
Endpoint = 198.51.100.101:51871
#+dangerous

Which is being parsed as:

WG_0_PEER_A_PUBLIC_KEY => {
'dangerous' => undef
}