Abort response when path doesn't start with slash

[jaydoane]

Overview

Currently a path that doesn't begin with a / causes a no match error and crash. This can fill up logs with unwanted junk, and be generally annoying.

2024-08-23 17:54:26.603 08/23 17:54:26.603 somehost db13  -              CRASH REPORT Process  (<0.19262.7388>) with 0 neighbors crashed with reason: no match of right hand value {"..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\windows\\win.ini",[],[]} at chttpd:handle_request_int/1(line:239) <= mochiweb_http:headers/6(line:140) <= proc_lib:init_p_do_apply/3(line:240); initial_call: {mochiweb_acceptor,init,['Argument__1','Argument__2',...]}, ancestors: [chttpd,chttpd_sup,<0.1261.0>], message_queue_len: 0, links: [<0.1450.0>,#Port<0.891112>], dictionary: [{couch_rewrite_count,0}], trap_exit: false, status: running, heap_size: 610, stack_size: 28, reductions: 3198

This adds a check for path validity, and exits with a shutdown if the path is invalid.

Testing recommendations

make eunit apps=chttpd suites=chttpd_invalid_path_test

Related Issues or Pull Requests

Checklist

• Code is written and works correctly
• Changes are covered by tests
• Any new configurable parameters are documented in rel/overlay/etc/default.ini
• Documentation changes were made in the src/docs folder
• Documentation changes were backported (separated PR) to affected branches