[Bug 191415] New: CARP password with "-" causes /etc/rc.d/netif to infinite loop

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191415

            Bug ID: 191415
           Summary: CARP password with "-" causes /etc/rc.d/netif to
                    infinite loop
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: Normal
         Component: conf
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: vivek at khera.org

I just upgraded a system from freebsd 9.1 to 10.0-p6. It is a member of a CARP
cluster, so I updated the configuration as follows:

 ifconfig_em0_alias0="inet 192.168.97.97/23 vhid 205 advskew 100 pass aaa-bbb"

in my /etc/rc.conf file. Previously, it was on a cloned interface carp0. The
em0 interface also has its own IP address for the machine.

On reboot, the machine 'hangs' running /etc/rc.d/netif. Booting into single
user and commenting out that one line lets it boot, albeit without the
necessary CARP address activated.

I played around with it, and I discovered that if I remove the "-" in the
password, the netif script completes.

However, it still does not apply the CARP address alias, but this PR is about
the infinite loop, and likely I'm doing something wrong to set the address.

Environment:
System: FreeBSD redfish.kcilink.com 10.0-RELEASE-p6 FreeBSD 10.0-RELEASE-p6 #2
r267868: Wed Jun 25 09:49:14 EDT 2014
vivek at lorax.kcilink.com:/u/lorax1/usr10/obj/u/lorax1/usr10/src/sys/KCI64 amd64

How-To-Repeat:
add an alias similar to the one above, then run

sh -x /etc/rc.d/netif restart

to watch it go into an infinite loop.

Fix:
Do not use "-" in the CARP password of an ifconfig alias in /etc/rc.conf

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