support non-ascii chars in hgrev (#582)

* support non-ascii chars in hgrev

Let the utf-8 flow!

* reduce lifetime of hgrev processes to alay memory leak for now

Author: ewdurbin

salt/hg/config/hg.apache.conf.jinja

@@ -46,7 +46,7 @@
 
     # A lightweight standin for revision app to maintain support for /lookup
     WSGIDaemonProcess hgrev user=hg group=hg \
-        threads=2 processes=4 maximum-requests=1000 \
+        threads=1 processes=6 maximum-requests=100 \
         display-name=hgrev
     # The Location hack ensures the lookup app is run within
     # this process group

salt/hg/files/hg/src/hgrev.py

@@ -17,7 +17,7 @@ def __init__(self, verbose=False):
     def successful_response(self, response, contents):
         headers = [("Content-Type", "text/plain")]
         response("200 OK", headers)
-        return [contents.encode()]
+        return [contents]
 
     def failed_response(self, response, detail=""):
         headers = [("Content-Type", "text/plain")]
@@ -46,7 +46,7 @@ def __call__(self, env, response):
                 command,
                 cwd=hg_repo,
                 capture_output=True,
-                text=True,
+                text=False,
                 shell=False,
                 check=True
             )