minor, error out upon NULL gbuf or gbuf write errors in work_ser()
fix, PEBKAC, for gbufs if CLEN_UNKNOWN is given calculate the size
hygiene, only branch into memcpy() for >0 sizes in gand_gbuf_write()
Merge branch 'core/gandalfd'

* core/gandalfd:
  hygiene, only branch into memcpy() for >0 sizes in gand_gbuf_write()
  fix, PEBKAC, for gbufs if CLEN_UNKNOWN is given calculate the size
  minor, error out upon NULL gbuf or gbuf write errors in work_ser()
hygiene, log if unknown connections have been passed to free_conn()
hygiene, log if unknown buffers have been passed to free_gand_gbuf()
minor, clena up connections upon SIGPIPE
hygiene, define NVERBS for users to have an idea how many HTTP verbs there are
chore, properly describe usage of gandaux build command
minor, put some logging statements into gandalfd
minor, perform rigorous checks on www-dir
chore, rename www-dir -> wwwdir in both cli and lua
minor, install inotify watcher on symbol index file
hygiene, enqueue only in case of success in _enq_resp()
minor, come by without chdir()ing to the www-directory
Merge branch 'core/gandalfd'

* core/gandalfd:
  minor, come by without chdir()ing to the www-directory
  hygiene, enqueue only in case of success in _enq_resp()
  minor, install inotify watcher on symbol index file
  chore, rename www-dir -> wwwdir in both cli and lua
  minor, perform rigorous checks on www-dir
  minor, put some logging statements into gandalfd
  chore, properly describe usage of gandaux build command
  hygiene, define NVERBS for users to have an idea how many HTTP verbs there are
  minor, clena up connections upon SIGPIPE
  hygiene, log if unknown buffers have been passed to free_gand_gbuf()
  hygiene, log if unknown connections have been passed to free_conn()