NetworkManager floods syslog

Binary package hint: network-manager

System logs (syslog and daemon.log) are flooded with informational messages from NetworkManager, such as:

Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Cancelling authentication timeout
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Removed BSSID 00:18:4d:93:0a:d6 from blacklist
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): State: ASSOCIATED -> COMPLETED
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): CTRL-EVENT-CONNECTED - Connection to 00:18:4d:93:0a:d6 completed (reauth) [id=0 id_str=]
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): CTRL_IFACE monitor send - hexdump(len=40): 2f 76 61 72 2f 72 75 6e 2f 4e 65 74 77 6f 72 6b 4d 61 6e 61 67 65 72 2f 77 70 61 5f 63 74 72 6c 5f 34 35 37 38 2d 35 00
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): wpa_driver_wext_set_operstate: operstate 0->1 (UP)
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): WEXT: Operstate: linkmode=-1, operstate=6
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Cancelling scan request
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK: operstate=1 ifi_flags=0x11003 ([UP][LOWER_UP])
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): WEXT: Operstate: linkmode=-1, operstate=6
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK, IFLA_IFNAME: Interface 'ath0' added
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK: operstate=1 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK, IFLA_IFNAME: Interface 'ath0' added
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK: operstate=1 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Wireless event: cmd=0x8b06 len=8
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): RTM_NEWLINK: operstate=1 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Wireless event: cmd=0x8b19 len=8
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Received 631 bytes of scan results (3 BSSes)
Apr 24 20:03:59 localhost NetworkManager: <information>^Iwpa_supplicant(5459): Scan results: 3