Tidy up "status_captiveportal" XHTML

Add SUMMARY to TABLES
Close BR tag correctly
Remove misplaced double quote from TD tag
Remove PHP ECHO that isn't in a PHP statement
Update HTML Boolean operator
Add COLSPAN into the last table cell to fill the width of the table
Move NOWRAP to CLASS statement
Close IMG tags and add ALT
Add BODY between HEAD.INC and FBEGIN.INC
Remove TYPE from TEXTAREA, invalid in XHTML
Add closing BODY and closing HTML tags
Deprecate Ampersand in Anchor tags
Tidy up spelling mistake