support for Cray Computer Corp's CSOS

HP-UX specific load average computation (works for multiprocessor;
undocumented in HP-UX 9.0)

refuse connections if there isn't enough disk space on the
queue partition

#ifdef NAMED_BIND => #if

add several new map types; beginnings of hosts switched lookup

AIX fixes

SVR4 statvfs fix

portability fixes for Amdahl UTS System V 2.1.5

patches for Altos System V

prog and *file* mailers need "o" flag for V6 configs

don't close seq maps -- this causes double-closes

"switch" class is not rebuildable -- only the underlying types are

IRIX64 and DG-UX updates

don't create maps that won't be used -- there is too much
overhead in opening them, and it can cause error messages

remove Content-Type: header from returned messages if and only if
no body is to be returned -- this could confuse mail readers

allow map defs without file names in map_parse

set UseNameServer on the basis of whether "dns" is in the service switch

allow dotted option names

first cut at DSN implementation

compile problems on various platforms

get it to compile on other environments

first cut at service switch abstraction

set VendorCode

first cut at NeXT NetInfo map class -- still somewhat crude

add hesiod changes