Revert "Bug #3415 - fix nntp access"

This reverts commit 5fe468b7acf5bcb614c2a359df125b3e2bf6e075.
nntpd.c: Proper fix for bug #3415 ([LIST]GROUP broken if 'newsprefix' is non-empty string)
imapd.c: fixed a bug in trashacl() where the GETACL final response wasn't being ingested at the proper time, thus causing an error in the subsequent DUMPACL command if an intervening SETACL command wasn't sent (also used getresult() to replace response parsing code)