o Add shortcut macros for append() to make things more readable.
o The separator in append() is now a string instead of a char.
o In append(), only prepend the separator if the last char is not a '!'.
This is a hack but it greatly simplifies '!' handling.
o In -l mode, Runas lists and NOPASSWD/PASSWD tags are now inherited
across entries in a list (matches current behavior).
o Fix formatting in -l mode such that items in a list are separated by
a space. Greatlt improves readability.
o Space for name field in struct aliasinfo is now allocated dyanically
instead of using a (big) buffer.
o In add_alias(), only search the list once (lsearch instead of lfind + lsearch)
It turns out the old DES crypt does the right thing with passwords
longert than 8 characters.
o Fix common typo (necesary -> necessary)
o Update TODO list
but the NOPASSWD flag was set.
Make runasspec, runaslist, runasuser, and nopasswd typeless in parse.yacc
Add support for '!' in the runas list
Fix double printing of '%' and '+' for groups and netgroups respectively
Add *_matched macros (no need for local stack variable). Should only be
used directly after a pop (since top must be >= 2).
