Updates for user-agent parsing:

 * Added "user-agent:" to minilex
 * Added WSI_TOKEN_HTTP_USER_AGENT to libwebsockets.h
 * Recompiled lextable.h
 * Updated libwebsockets_parse to accommodate new header
Bumped patch + updated spec + changelog
Merge branch 'release/nytd_v1.3.3' into nytd_build