add "-o modern" option for easy default updates
add "-o modern" option for easy default updates

I've been recommending people use a long string of arguments as the canonical
way of starting memcached. This boils it down to a single argument that should
automatically pick up new stuff in the future as well.

These defaults will become the real defaults at some point, so I hope folks
are trying it out.

gencer/memcached,rmccullagh/memcached,samanbarghi/memcached,samanbarghi/memcached,rmccullagh/memcached,gencer/memcached,bpzhang/memcached,gencer/memcached,rmccullagh/memcached,elfchief/memcached,dormando/memcached,elfchief/memcached,memcached/memcached,elfchief/memcached,dormando/memcached,memcached/memcached,bpzhang/memcached,dormando/memcached,rmccullagh/memcached,memcached/memcached,memcached/memcached,elfchief/memcached,rmccullagh/memcached,samanbarghi/memcached,guikcd/memcached,dormando/memcached,guikcd/memcached,memcached/memcached,guikcd/memcached,dormando/memcached,samanbarghi/memcached,elfchief/memcached,bpzhang/memcached,gencer/memcached,guikcd/memcached,gencer/memcached,guikcd/memcached,bpzhang/memcached