Call proper free function on error in htp_config_copy
php: call bstr_free on bstr
htp_table: call bstr_free on bstr.
Free htp_param_t::name and htp_param_t::value using bstr_free.
Tag buflen in htp_transcode_bstr as const as a hint to devs that it won't change
Merge pull request #66 from inliniac/fixes-v1

Merge various small fixes submitted by Victor.