If ttyd is configured to ssl, you will get the following message in the
log `refuse to serve WS client for illegal ws path`. Upstream a patch
has already been applied which fixes this.

Since there is no newer version than 1.6.1, this fix is backported as a
patch. And could be removed if a new version of ttyd is available.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

Refresh patch.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Shuanglei Tao <tsl0922@gmail.com>

Removed CMAKE_INSTALL as there's no need for InstallDev.

Added PKG_BUILD_PARALLEL for faster compilation.

Small cleanups.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Richard Yu <yurichard3839@gmail.com>