Add cgit.conf to .gitignore, remove *~

Not having cgit.conf in .gitignore is a bug, while having *~ is a personal
preference.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

.gitignore

@@ -1,5 +1,5 @@
 # Files I don't care to see in git-status/commit
 cgit
+cgit.conf
 VERSION
 *.o
-*~