security update: shadow, util-linux, and curl

February ended with an update from Patrick and it includes several security updates in -current tree only

• shadow: Rebuilt to fix potential issue with PAM-based system
• util-linux: Rebuilt to fix potential issue with PAM-based system
• curl: Upgraded to 7.53.1

There weren't many interesting updates in last week's update:

• coreutils: Added more file extensions
• ed: Upgraded to 1.14.2
• etc: Rebuilt to add new cgred group
• libcgroup: Rebuilt to fix rc.cgred
• nano: Upgraded to 2.7.5
• screen: Upgraded to 4.5.1
• guile: Upgrade to 2.0.14
• cairo: Upgraded to 1.14.8
• fftw: Upgraded to 3.3.6_pl1
• libimobiledevice: Rebuilt to support iOS 10 devices
• libsigservd: Upgraded to 2.11
• ModemManager: Upgraded to 1.6.4
• NetworkManager: Upgraded to 1.6.2
• libmbim: Upgraded to 1.14.0
• libqmi: Upgraded to 1.16.2
• windowmaker: Rebuilt to disable overly verbose logging messages

I'm looking forward to see GTK+3 stack updated so i can finally test latest MATE Themes. Hopefully that won't took too long :)