Improve docs for PROTOCOL and HTTP_ADDR options (#2231)

Fixes: #2230

conf/app.ini

@@ -94,9 +94,11 @@ CUSTOM_URL_SCHEMES =
 FILE_EXTENSIONS = .md,.markdown,.mdown,.mkd
 
 [server]
+; Listen protocol. One of 'http', 'https', 'unix' or 'fcgi'.
 PROTOCOL = http
 DOMAIN = localhost
 ROOT_URL = %(PROTOCOL)s://%(DOMAIN)s:%(HTTP_PORT)s/
+; Listen address. Either a IPv4/IPv6 address or the path to a unix socket.
 HTTP_ADDR = 0.0.0.0
 HTTP_PORT = 3000
 ; Permission for unix socket
@@ -156,7 +158,7 @@ LFS_START_SERVER = false
 ; Where your lfs files put on, default is data/lfs.
 LFS_CONTENT_PATH = data/lfs
 ; LFS authentication secret, changed this to yourself.
-LFS_JWT_SECRET   = 
+LFS_JWT_SECRET   =
 
 ; Define allowed algorithms and their minimum key length (use -1 to disable a type)
 [ssh.minimum_key_sizes]