Bit by the Ubuntu 18.04 pkg system

[Thomas D. Dean]

I just updated to ubuntu 18.04, using the do-release-upgrade tool. 
Then, apt dist-upgrade then apt autoremove.

This updated lots of libraries.  Since I use octave built from hg, this 
removed some libraries octave was linked with.

Now, I have to rebuild octave. make distclean.  hg stuff. make -j8. 
make check.  make install.

Don't really need help, just blowing off steam.  Mostly because of my 
inattention to detail.

Now, I don't remember what I wanted to calculate!  But, at least I can 
calculate again.

HG ID for this build is "38a881b8fbec"


Tom Dean