Erroneous 'Unable to determine fingerprint' warnings

Sebastian reported that arm is giving him a weird warning...

03:00:02 [ARM_WARN] Unable to determine the fingerprint for a relay in our own circuit: BUILD_FLAGS=NEED_CAPACITY [1 duplicate hidden]

This is because in torTools.py we are misparsing a key=value entry as being the path. According to the spec those lines have an optional path followed by several optional key=value entries.

We should simply add a check for '=' to rule it out as being a key=value entry.

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