* general/login_page.php: Fixed HTML and use print_image function
* include/functions.php: Added version compare for alternative to
double encoding HTML for PHP < 5.2.3
* include/functions_ui.php: Check for empty string on print_string_substr
so we don't print empty spans
* include/functions_html.php: Better validation and correct output on
print_input_text_extended. Now accepts an array for attributes
* operations/user/user.php, operations/user/user_edit.php,
godmode/user/user_list.php: Small cosmetic fixes
* index.php: flush and print closing html tag on exits. This prevents
automatic flushing to print tags after </html>.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@1463 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
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