From here: link
I read:
index_file file name no index.html, index.htm, default.html, default.htm Index file to use for directories, e.g. add index.php when using php
index_page file name no index.html Index file to use for directories, e.g. add index.php when using php (last, 20131015, replace index_file ?) should be noted: list index_page "index.html"
and if I put in my config file:
# Index file to use for directories, e.g. add index.php when using php
option index_page 'index.html'
option index_page 'index.php'
the command uci show uhttpd tells me:
uhttpd.main.index_page=index.html index.php
infact i have a index**.php** in /sd that works! and the index**.html** in the /www that works also...the only one that doesn't work is the index.html in the /keystore_manager_example dir