Tidy up "services_captiveportal_hostname" XHTML

Swap BODY with php statement
Add SUMMARY to tables
Close IMG and add ALT
Deprecate ampersand
Update HTML Boolean operators
Close INPUT
Tidy up "services_captiveportal_hostname" XHTML

Swap BODY with php statement
Add SUMMARY to tables
Close IMG and add ALT
Deprecate ampersand
Update HTML Boolean operators
Close INPUT
Merge pull request #1052 from ExolonDX/branch_master_09

Branch master 09