.hostaliases: perfect match only, allow empty lines

defeat DEFNAMES if removing trailing '.'; fix typo

reject numeric hostnames without bothering the root;
rename strcasencmp

checked in for karels; fix NO_ADDRESS error, use C library
case-insensitive comparison routines rather than local ones

portability fixes from dpk

make hostalias more paranoid about its input

clear h_errno on search in case later try succeeds

try ascending domain tree, starting with local domain,
even if dots in name; trailing dot forces fully qualified;
add host aliases, in file with name in environment

Fix compatiblity problems with 4.2 and 4.3, #ifdef was wrong in version .-1

fix for 4.2bsd

change getshort() to _getshort()

zero errno

correct alignment of return values; from burht@el.purdue.edu

"case-insensitive" when using /etc/hosts

remove param.h

lint clean up

fix _gethtbyaddr()

change gethostbyname to do a query of class C_IN insted of C_ANY

move resolv.h to /usr/include

Add old linear search of /etc/hosts for when the local name server
is dead, we recive a ECONNREFUSED.

added LIBC_SCCS condition for sccs ids

Pass msglen to dn_expand

Add 4 Error return states and make byte order independent

Changes for 4.2bsd from Mike@brl

Freeze for November 1 network distribution