* add support for Content-Disposition header (rfc1806).
* merge the two places in which mhshowsbr.c reads display
strings.
-* split mhn into mhshow, mhlist, mhstore, and mhcache.
* when storing to a folder, should we save the folder context
first, so that storage string of "+" stores to the new
folder?
* some of the calls to setjmp/longjmp should be replaced with
sigsetjmp/siglongjmp.
* When do we need to add -lresolv for SunOS 4.1.x?
-* replace use of getcpy with strdup.
* replace use of ftell with fgetpos.