teco: for today: compare with edbrowse: (error reporting; read, write…

…, execlp and their declaration)

to do:  review this, again

Signed-off-by: Gunter Liszewski (@s10) <[email protected]>

Update the dist-xz URL

stage: changes for the installation

Signed-off-by: Gunter Liszewski <[email protected]>

release/v0.0 a pseudo thing, it's not ready, it's just to look at