server/general: fix a few pylint warnings

server/.pylintrc

@@ -14,3 +14,6 @@ disable=missing-docstring,no-self-use,too-few-public-methods,multiple-statements
 
 [typecheck]
 generated-members=add|add_all
+
+[similarities]
+min-similarity-lines=5

server/szurubooru/db/post.py

@@ -37,7 +37,7 @@ class PostFavorite(Base):
     post_id = Column(
         'post_id', Integer, ForeignKey('post.id'), primary_key=True, index=True)
     user_id = Column(
-    'user_id', Integer, ForeignKey('user.id'), primary_key=True, index=True)
+        'user_id', Integer, ForeignKey('user.id'), primary_key=True, index=True)
     time = Column('time', DateTime, nullable=False)
 
     post = relationship('Post')

server/szurubooru/func/mime.py

@@ -1,5 +1,6 @@
 import re
 
+# pylint: disable=too-many-return-statements
 def get_mime_type(content):
     if not content:
         return 'application/octet-stream'