I see the following messages, which I was not seeing earlier.  It eventually completes bootstrapping, 100%:

Sep 05 22:04:03.000 [notice] Bootstrapped 90%: Establishing a Tor circuit.
Sep 05 22:04:06.000 [warn] Problem bootstrapping. Stuck at 90%: Establishing a Tor circuit. (DONE; DONE; count 10; recommendation warn
)
Sep 05 22:04:06.000 [warn] 10 connections have failed:
Sep 05 22:04:06.000 [warn]  7 connections died in state connect()ing with SSL state (No SSL object)
Sep 05 22:04:06.000 [warn]  3 connections died in state handshaking (TLS) with SSL state unknown state in HANDSHAKE
Sep 05 22:04:06.000 [warn] Problem bootstrapping. Stuck at 90%: Establishing a Tor circuit. (Connection refused; CONNECTREFUSED; count 11; recommendation warn)
Sep 05 22:04:06.000 [warn] 10 connections have failed:
Sep 05 22:04:06.000 [warn]  7 connections died in state connect()ing with SSL state (No SSL object)
Sep 05 22:04:06.000 [warn]  3 connections died in state handshaking (TLS) with SSL state unknown state in HANDSHAKE
Sep 05 22:04:07.000 [warn] Problem bootstrapping. Stuck at 90%: Establishing a Tor circuit. (Connection refused; CONNECTREFUSED; count 12; recommendation warn)
Sep 05 22:04:07.000 [warn] 11 connections have failed:
Sep 05 22:04:07.000 [warn]  8 connections died in state connect()ing with SSL state (No SSL object)
Sep 05 22:04:07.000 [warn]  3 connections died in state handshaking (TLS) with SSL state unknown state in HANDSHAKE