Beginning of 1.79 development cycle

Release candidate for Orbit 1.78

Orbit Release 1.77

Revert "Make the service signal when it's ready (google#3393)" (googl…

…e#3471)

This reverts commit 39ccc2d.

This change uncovered a bug in our libssh2 wrapper library. The fix is
non-trivial so I prefer to revert this on the release branch. The fix
will go into the main branch in parallel.

Beginning of 1.78 development cycle

Release candidate for Orbit 1.77

Orbit Release 1.76

Beginning of 1.77 development cycle

Release candidate for Orbit 1.76

Orbit Release 1.75