[shepherd] branch wip-fibers created (now 81cc115)

[Ludovic Courtès]

civodul pushed a change to branch wip-fibers
in repository shepherd.

      at 81cc115  service: 'read-pid-file' uses (@ (guile) sleep) when it's not 
suspendable.

This branch includes the following new commits:

     new f7a28cd  shepherd: Factorize out the main loop.
     new 70729b6  build: Drop support for Guile 2.0.
     new 934204f  Use Fibers.
     new fae59fb  build: Capture the source and object directories of Fibers.
     new aff030b  shepherd: Use one fiber for signal handling, and one for 
clients.
     new fde2709  service: 'read-pid-file' no longer blocks.
     new 81cc115  service: 'read-pid-file' uses (@ (guile) sleep) when it's not 
suspendable.

The 7 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.