Bug 1281821 - Docs: Correct Pulse environment variable references (#4097)

To account for the changes in #3948.

docs/pulseload.md

@@ -110,7 +110,8 @@ push_sources = [
 ```
 
 #### Jobs
-Job Exchanges and Projects can be configured in the environment like so:
+Job Exchanges and Projects are defined in ``job_sources``, however can
+also be configured in the environment like so:
 
 ``PULSE_JOB_SOURCES`` defines a list of exchanges with projects.
 ```bash
@@ -146,7 +147,7 @@ celery -A treeherder worker -B -Q pushlog,store_pulse_jobs,store_pulse_resultset
 * The ``store_pulse_resultsets`` queue will ingest all the pushes from the exchanges
   specified in ``push_sources``.  This can be Mercurial and Github
 * The ``store_pulse_jobs`` queue will ingest all the jobs from the exchanges
-  specified in ``PULSE_JOB_EXCHANGES``.
+  specified in ``job_sources`` (or ``PULSE_JOB_SOURCES``).
 
 ```eval_rst
 .. note:: Any job that comes from **Pulse** that does not have an associated push will be skipped.

treeherder/services/pulse/connection.py

@@ -7,8 +7,8 @@ env = environ.Env()
 
 def build_connection():
     """Build a Kombu Broker connection to Mozilla Pulse."""
-    # Used to specify the PulseGuardian account that will be used to create
-    # ingestion queues for the exchanges specified in ``PULSE_SOURCE_EXCHANGES``.
+    # Used to specify the PulseGuardian account that will be used to create ingestion
+    # queues for the exchanges specified in treeherder/services/pulse/sources.py.
     # See https://pulse.mozilla.org/whats_pulse for more info.
     # Example: "amqp://myuserid:mypassword@pulse.mozilla.org:5672/?ssl=1"
     pulse_url = env.url("PULSE_URL")