Replace coTURN by Coturn

The official spelling of *Coturn* seems to be just with a capital
starting letter, replace all occurrences of *coTURN* with the command
below.

    git grep -l coTURN | xargs sed -i 's/coTURN/Coturn/g'

docker/coturn/Dockerfile

@@ -8,11 +8,11 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
 	apt-get update && \
 	apt-get install -y build-essential git debhelper dpkg-dev libssl-dev libevent-dev sqlite3 libsqlite3-dev postgresql-client libpq-dev default-mysql-client default-libmysqlclient-dev libhiredis-dev libmongoc-dev libbson-dev
 
-# Clone coTURN
+# Clone Coturn
 WORKDIR ${BUILD_PREFIX}
 RUN git clone https://github.com/coturn/coturn.git
 
-# Build coTURN
+# Build Coturn
 WORKDIR coturn
 RUN ./configure
 RUN make

docker/coturn/turnserver.conf

@@ -640,7 +640,7 @@ no-loopback-peers
 # Allocate Address Family according
 # If enabled then TURN server allocates address family according  the TURN
 # Client <=> Server communication address family.
-# (By default coTURN works according RFC 6156.)
+# (By default Coturn works according RFC 6156.)
 # !!Warning: Enabling this option breaks RFC6156 section-4.2 (violates use default IPv4)!!
 #
 #keep-address-family

docker/docker-compose-all.yml

@@ -49,7 +49,7 @@ services:
       - backend
 
 
-# coTURN
+# Coturn
   coturn:
     build:
       context: ./coturn

docker/docker-compose-mongodb.yml

@@ -13,7 +13,7 @@ services:
       - backend
 
 
-# coTURN
+# Coturn
   coturn:
     build:
       context: ./coturn

docker/docker-compose-mysql.yml

@@ -14,7 +14,7 @@ services:
       - backend
 
 
-# coTURN
+# Coturn
   coturn:
     build:
       context: ./coturn

docker/docker-compose-postgresql.yml

@@ -14,7 +14,7 @@ services:
       - backend
 
 
-# coTURN
+# Coturn
   coturn:
     build:
       context: ./coturn

docker/docker-compose-redis.yml

@@ -14,7 +14,7 @@ services:
       - backend
 
 
-# coTURN
+# Coturn
   coturn:
     build:
       context: ./coturn

examples/etc/coturn.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=coTURN STUN/TURN Server
+Description=Coturn STUN/TURN Server
 Documentation=man:coturn(1) man:turnadmin(1) man:turnserver(1)
 After=network.target
 After=network-online.target

examples/etc/turnserver.conf

@@ -631,7 +631,7 @@
 # Allocate Address Family according 
 # If enabled then TURN server allocates address family according  the TURN 
 # Client <=> Server communication address family.
-# (By default coTURN works according RFC 6156.)
+# (By default Coturn works according RFC 6156.)
 # !!Warning: Enabling this option breaks RFC6156 section-4.2 (violates use default IPv4)!!
 #
 #keep-address-family