fix, PEBKAC, actually install DSOs (svc-pong only) into unsermoddir

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, define unsermoddir at configure time, convenience move that mimicks packages using unsermoddir var from unserding.pc

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, also export libunserding symbols dynamic(ally) so DSOs can use them

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist' into next

* bld/dist:
  chore, also export libunserding symbols dynamic(ally) so DSOs can use them
  chore, define unsermoddir at configure time, convenience move that mimicks packages using unsermoddir var from unserding.pc
  fix, PEBKAC, actually install DSOs (svc-pong only) into unsermoddir
Merge branch 'next'

* next:
  chore, also export libunserding symbols dynamic(ally) so DSOs can use them
  chore, define unsermoddir at configure time, convenience move that mimicks packages using unsermoddir var from unserding.pc
  fix, PEBKAC, actually install DSOs (svc-pong only) into unsermoddir
  minor, adapt unsermon to slightly abridged ud_get_aux() api
  minor, shift ud_get_aux() and ud_scoket_addr() to unserding.h (away from ud-private.h)
  chore, kick uterus check, unserding is now free from external deps (except libev)
  minor, kick svc-uterus unsermon DSO, now to be found in unsermarkt
  minor, install unsermon.h so DSOs can relate to entry points