As requested by ache@, I removed them. The real libmytinfo exists in 3.x and below. After that, it is only a link and libncurses has its functionality. I just got krismail about 1x ports are broken. I fix 4 of them and I don’t think the rest are really broken (they only checks libmytinfo in configure). I’m building a new HEAD jail in my tinderbox, so I can test them.
I should really go to bed (it’s 5am here). 
Half hours ago, I received a mail from core-secretary@ about my src bit. Now I’m punished again for my recent ncurses work. I would like to thank delphij@ again for mentoring me (again). Hope my collection of pointyhats will not grow too fast.
Today, I spent some time to get wide character support in base’s ncurses. Basically, most work were some six months ago. I managed to get lib32 build work by defining WORLD32 in ${LIB32MAKE} and do not set ${INCS} if WORLD32 is defined. So, it looks like
.if !defined(WORLD32)
INCS= ${HEADERS} ${SRCHDRS}
INCSLINKS= curses.h ${INCLUDEDIR}/ncurses.h
.endif
I’m still running a make universe to make sure everything work. At least, amd64+lib32 and i386 build fine. On my i386 current, mutt works flawlessly with ncursesw. I will post the patch to -current once make universe is finished.
After almost four years, the base’s ncurses is finally updated to 5.6 which is released last Dec. This work starts half year ago and restarted few weeks ago. I would like to thank everyone who helped me to do this update, especially delphij@ (reviewing patch and src commit approval) and kris@ (an exp run on pointyhat).
This is my first src commit and there are few errors: I accidentally import bash.core (but cvs automatically ignores it. Thanks God!), a typo, and I forget to do a force commit before removing old ncurses build glue. Well, the best thing is buildworld is ok and the ncurses is updated.
So, the next step is to enable wide character support and merge ncurses 5.6 into RELENG_6.