Avatar uploads do not accept files with uppercase extensions.

[CPilko]

Attempting to upload a valid file with an uppercase extension gives an error "Please upload only JPG, GIF or PNG photos."

Line 525 of /bp-core/bp-core-avatars.php should be changed from:

	if ( ( !empty( $file['file']['type'] ) && !preg_match('/(jpe?g|gif|png)$/', $file['file']['type'] ) ) || !preg_match( '/(jpe?g|gif|png)$/', $file['file']['name'] ) )

to a case insensitive preg_match.

	if ( ( !empty( $file['file']['type'] ) && !preg_match('/(jpe?g|gif|png)$/i', $file['file']['type'] ) ) || !preg_match( '/(jpe?g|gif|png)$/i', $file['file']['name'] ) )

[r-a-y]

Duplicate of #3087.

[johnjamesjacoby]

Moving closed ticket out of Awaiting Review.