Cosmetic changes to Lua binding in bozohttpd.

- Don't use negative indicies to read arguments of Lua functions.
- On error, return nil, "error string".
- Use ssize_t for return values from bozo_read

Cosmetic changes to Lua binding in bozohttpd.

- Don't use negative indicies to read arguments of Lua functions.
- On error, return nil, "error string".
- Use ssize_t for return values from bozo_read() and bozo_write().
- Prefer lstring especially when if saves you from appending NUL and
doing len + 1 which can potentially wraparound.
- Don't mix C allocations with Lua functions marked with "m" in the Lua
manual. Those functions may throw (longjump) and leak data allocated
by C function. In one case, I use luaL_Buffer, in the other case,
I rearranged calls a bit.

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rename bozo_err/bozo_warn/bozo_asprintf to bozoerr/etc.
new rule is that function that mirror libc-style functions get no underscore.

several clean ups:

- bozostrdup() gains a request parameter, and uses it to determine
what sort of error handling is required
- bozo_strdup() dies
- size_arrays() reduced slightly, pushing error h

several clean ups:

- bozostrdup() gains a request parameter, and uses it to determine
what sort of error handling is required
- bozo_strdup() dies
- size_arrays() reduced slightly, pushing error handling into the caller
- convert to size_t for some array indices
- bozo_set_pref() and bozo_init_prefs() gain httpd parameters
- apply a bunch of manual CSE to vastly reduce the number of times the
string "request->hr_httpd" appears.
- CGI parse_header() takes a request not httpd now

XXX: lua glue updated to call bozo_init_prefs() with htttpd parameter,
but i'm only guessing here.

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fix memory leaks on error; found by brainy.

NUL terminate a string.

lua: updated from 5.1 to 5.3 work3

* lua(1):
- changed lua_Integer to intmax_t
- updated distrib/sets/lists and etc/mtree
- updated bsd.lua.mk
- fixed bozohttpd (lua-bozo.c)
- compatibiliz

lua: updated from 5.1 to 5.3 work3

* lua(1):
- changed lua_Integer to intmax_t
- updated distrib/sets/lists and etc/mtree
- updated bsd.lua.mk
- fixed bozohttpd (lua-bozo.c)
- compatibilized bindings: gpio, sqlite
* lua(4):
- removed floating-point and libc dependencies using '#ifndef _KERNEL'
- fixed division by zero and exponentiation
- libkern: added isalnum(), iscntrl(), isgraph(), isprint() and ispunct()
- acpica: removed isprint() from acnetbsd.h
- libc: moved strcspn.c, strpbrk.c and strspn.c to common
- removed stub headers
- compatibilized bindings: luapmf, luasystm
* reorganized luaconf.h
* updated doc/CHANGES and doc/RESPONSIBLE

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- update CHANGES with recent changes
- update version to 20140102
- update copyrights
- use getcwd() over getwd()
- fix lean build (don't include lua)

fix bad free

CID 1107545, 1107546: fix memory leak

CID 1107546: Fix memory leak

fold long line in a readable way; pass nil as query table if reading form data fails

better approach to NUL terminate strings

plug a memory leak

zero allocated memory buffers

add Lua scripting support to bozohttpd, see httpd(8) for details