related files. Partition into three categories:
* shl.mi -- MI sharedlib files present on all ports with shared libs
* shl.aout -- MI sharedlib files present on all ELF ports
* shl.elf -- MI sharedlib files present on all a.out ports
Add rudimentary shl* support to makeflist.
Remove files left empty after shlib normalization.
Add ad.mips where appropriate.
Make libc, libedit numbers consistent (libc.so.12.29, libedit.2.1).
* factor all m68k common stuff into lists/*/ad.m68k
XXX: this should be done for mips (when it's not just the pmax), and
powerpc (when there's a powerpc port put here ...)
