Use correct (multi-user) target when installing systemd units

The 'network.target' is special (per systemd.special(7)), and is to be
brought up indirectly when network is actually configured (i.e. through
DHCP or static address settings).

Irrelevant of that, all services should be always installed in
multi-user.target.

[Bug 427]

wpa_supplicant/systemd/wpa_supplicant-nl80211@.service.in

@@ -10,4 +10,4 @@ Type=simple
 ExecStart=@BINDIR@/wpa_supplicant -c/etc/wpa_supplicant/wpa_supplicant-nl80211-%I.conf -Dnl80211 -i%I
 
 [Install]
-Alias=network.target.wants/wpa_supplicant-nl80211@wlan0.service
+Alias=multi-user.target.wants/wpa_supplicant-nl80211@wlan0.service

wpa_supplicant/systemd/wpa_supplicant-wired@.service.in

@@ -10,4 +10,4 @@ Type=simple
 ExecStart=@BINDIR@/wpa_supplicant -c/etc/wpa_supplicant/wpa_supplicant-wired-%I.conf -Dwired -i%I
 
 [Install]
-Alias=network.target.wants/wpa_supplicant-wired@wlan0.service
+Alias=multi-user.target.wants/wpa_supplicant-wired@wlan0.service

wpa_supplicant/systemd/wpa_supplicant.service.in

@@ -7,5 +7,5 @@ BusName=fi.epitest.hostap.WPASupplicant
 ExecStart=@BINDIR@/wpa_supplicant -u
 
 [Install]
-WantedBy=network.target
+WantedBy=multi-user.target
 Alias=dbus-fi.epitest.hostap.WPASupplicant.service

wpa_supplicant/systemd/wpa_supplicant@.service.in

@@ -10,4 +10,4 @@ Type=simple
 ExecStart=@BINDIR@/wpa_supplicant -c/etc/wpa_supplicant/wpa_supplicant-%I.conf -i%I
 
 [Install]
-Alias=network.target.wants/wpa_supplicant@wlan0.service
+Alias=multi-user.target.wants/wpa_supplicant@wlan0.service