* implementor.texinfo (Local Addresses): Drop Mac OS 9, add Solaris 9, HP-UX

* implementor.texinfo (Local Addresses): Drop Mac OS 9, add Solaris 9, HP-UX
11.
(IPv6 Support, Host Address Lookup): Update for fake getaddrinfo code moved to
support library.
(Thread System Requirements): Use @code when listing function names.  Add a
couple notes about some problematic routines.
(Internal Thread API): Update k5_mutex_t description to indicate there's always
non-OS data included.  Describe case where thread support is disabled.
(Advanced Shared Library Requirements): Describe recently raised Windows
DllMain issues.  Describe finalization code.  Multiple init/fini functions are
now allowed in a library.  Describe LIBINITFUNC and LIBFINIFUNC makefile
variables.  Mention lib.in can have rules for generating temporary files for
dealing with export lists.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17192 dc483132-0cff-0310-8789-dd5450dbe970