User guide: fix list of allowed URI characters
Some cleanup related to mt_rand()

- min and max values are 0 and mt_getrandmax() by default
- remove useless mt_srand() seed calls
Modified do_upload() to use UPLOAD_ERR constants.

Modified switchcase in the do_upload() use the UPLOAD_ERR_* constants,
instead of just using an integer, and then commenting out the constant
beside it.
fix typo : StdClass should be stdClass

Signed-off-by: Abdul Malik Ikhsan <samsonasik@gmail.com>
Merge pull request #2367 from vlakoff/develop

User guide: fix list of allowed URI characters
Merge pull request #2371 from thefuzzy0ne/fix/upload_err_constants

Modified do_upload() to use UPLOAD_ERR constants.
Merge pull request #2369 from vlakoff/develop-2

Some cleanup related to mt_rand()
Merge pull request #2375 from samsonasik/fix/typo

fix typo : StdClass should be stdClass