Several minor annoyances on Current

Hello. Several questions for 11-Current:

* I keep getting <appname>.core (gedit.core, midori.core, etc) files being
created either in /home/myuser or in the folder I run the command in on
terminal emulator (for example if I'm in ~/mydocs on terminal and run "$
gedit filename", that folder gets a gedit.core file). Any way to stop this?

* I noticed the system now does a dhcp lookup during boot, while in the past
it did not do so (I have static IP defined in rc.conf). Any reason for this
change, and how can I disable it (already have dhclient_enable="NO" in
rc.conf)

* Are there any tweaks (sysctl or such) for fastest possible shutdown for
"poweroff"?

* I have a kernel with all witness/debug code disabled, and the zfs root is
on a Sata3-SSD. The boot process seems a little slow to me and I'm curious
as to possible reasons. Other than disabling debug, what else can I do to
speed-up boot process (CPU: AMD Phenom II X4 B60 3415.38-MHz K8-class)

Thanks and Regards.



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FreeBSD-11-current_amd64_root-on-zfs_RadeonKMS
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