"tahoe cp -r * $DEST" incorrectly flattens subdirs

[zooko]

$ ls -al
total 1740
drwxrwxr-x 3 zooko zooko   4096 Nov 11 04:56 .
drwxrwxr-x 3 zooko zooko   4096 Nov 11 04:52 ..
-rw-rw-r-- 1 zooko zooko  80898 Aug 21 19:23 276a292eebb111e186fe22000a1c9ebd_7.jpg
-rw-rw-r-- 1 zooko zooko  96881 Nov 10 03:48 causes-of-death-2010.png
-rw-rw-r-- 1 zooko zooko  20450 Nov 11 04:52 hackers-2012-slides.html
-rw-rw-r-- 1 zooko zooko  11458 Nov 10 14:57 hackers-2012-slides.rst
-rw-rw-r-- 1 zooko zooko 948821 Nov 10 03:46 Murphy-2012-Deaths__Preliminary_Data_For_2010.pdf
-rw-rw-r-- 1 zooko zooko 113191 Nov 10 11:51 Neal-2008-Table4.png
-rw-rw-r-- 1 zooko zooko 117367 Nov 10 10:48 Neal-2008-The_ketogenic_diet_for_the_treatment_of_childhood_epilepsy__a_randomised_controlled_trial.pdf
-rw-rw-r-- 1 zooko zooko 148251 Nov 10 10:37 Neal-2010-Efficacy_Of_Dietary_Treatments_For_Epilepsy.pdf
-rw-rw-r-- 1 zooko zooko 219436 Nov 10 10:42 Neal-2010-Table2.png
drwxrwxr-x 4 zooko zooko   4096 Nov 10 14:04 ui
$ time tahoe cp -r * URI:DIR2-MDMF:qda3lf42dkxclwbuh5h7qwygne:obhqprvm6hafvarzzssrawgazx6p6tgopi4fslirhelg7xqyfr6a:
Success: files copied

real    0m26.085s
user    0m1.003s
sys     0m0.140s
HACK zompu:~/book/gitworld/presentations/hackers-2012$ tahoe ls -l URI:DIR2-MDMF:qda3lf42dkxclwbuh5h7qwygne:obhqprvm6hafvarzzssrawgazx6p6tgopi4fslirhelg7xqyfr6a:
-r--  80898 Nov 11 04:58                                                                  276a292eebb111e186fe22000a1c9ebd_7.jpg
-r-- 948821 Nov 11 04:58                                                       Murphy-2012-Deaths__Preliminary_Data_For_2010.pdf
-r-- 113191 Nov 11 04:58                                                                                    Neal-2008-Table4.png
-r-- 117367 Nov 11 04:58 Neal-2008-The_ketogenic_diet_for_the_treatment_of_childhood_epilepsy__a_randomised_controlled_trial.pdf
-r-- 148251 Nov 11 04:58                                               Neal-2010-Efficacy_Of_Dietary_Treatments_For_Epilepsy.pdf
-r-- 219436 Nov 11 04:58                                                                                    Neal-2010-Table2.png
-r--  96881 Nov 11 04:58                                                                                causes-of-death-2010.png
drwx      - Nov 11 04:56                                                                                                 default
-r--  20450 Nov 11 04:58                                                                                hackers-2012-slides.html
-r--  11458 Nov 11 04:58                                                                                 hackers-2012-slides.rst
drwx      - Nov 11 04:56                                                                                             small-white

This is wrong, causing my slides to be unable to load their CSS when viewed from Tahoe-LAFS (e.g.it looks like ​https://zooko.com/uri/URI%3ADIR2-MDMF-RO%3Appnrefnrnovjpoiv3jirjnpoim%3Aobhqprvm6hafvarzzssrawgazx6p6tgopi4fslirhelg7xqyfr6a/hackers-2012-slides.html when it should look like this: ​https://zooko.com/uri/URI:DIR2-MDMF-RO:nmrgdbrmwdta2bfzke4pfttsei:vlijvwz4kncumxkob5um45sni7btqelu4q5oltcl5nqxwjrif2iq/hackers-2012-slides.html).

The result should have been that the directory-and-file structure in the tahoe-lafs dir matched that in the local dir.

[davidsarah]

Duplicate of #712.