integrate changes from *Hobbit*

fix compile glitch on some compilers

add "strict" parameter to denlstring

add "strict" parameter to denlstring

incorporate fixes from 8.6.11

prototypes

add NoRecipientAction config option; truncate (don't delete) Bcc:

cleanup to make gcc -Winitialized happier

add ST_RULESET for full-word rulesets

don't need ST_TRUSTED -- use class 't' instead

avoid checking path directory modes if setreuid succeeded (for
efficiency)

fix security problem allowing bogus lines to be written to qf file
from command line or IDENT protocol by embedding newlines

add prototype of denlstring()

add ST_TRUSTED

cut at 20 January version of DSN document

delete things no longer needed with Message/RFC822-Headers

add UseHesiod variable

add prototype for wordinclass

generalize queue order configuration

add DialDelay

more DSN hacking

improve DSN handling somewhat + some bug fixes

clean up several small problems with file delivery, error detection,
and return receipts

convert to new DSN draft

prototype for emptyaddr