Update copyright to 2018.

This was done with:
find docs/ include/ language/ modules/ src/ *.* Config -exec sed -i 's/-20.. Anope Team/-2018 Anope Team/i' {} \;

modules/encryption/enc_bcrypt.cpp

@@ -1,6 +1,6 @@
 /* Module for providing bcrypt hashing
  *
- * (C) 2003-2017 Anope Team
+ * (C) 2003-2018 Anope Team
  * Contact us at team@anope.org
  *
  * This program is free but copyrighted software; see the file COPYING for

modules/encryption/enc_md5.cpp

@@ -1,7 +1,7 @@
 /* Module for encryption using MD5.
  *
  * Modified for Anope.
- * (C) 2003-2017 Anope Team
+ * (C) 2003-2018 Anope Team
  * Contact us at team@anope.org
  *
  * Taken from IRC Services and is copyright (c) 1996-2002 Andrew Church.

modules/encryption/enc_none.cpp

@@ -1,6 +1,6 @@
 /* Module for plain text encryption.
  *
- * (C) 2003-2017 Anope Team
+ * (C) 2003-2018 Anope Team
  * Contact us at team@anope.org
  *
  * This program is free but copyrighted software; see the file COPYING for

modules/encryption/enc_old.cpp

@@ -1,6 +1,6 @@
 /* Include file for high-level encryption routines.
  *
- * (C) 2003-2017 Anope Team
+ * (C) 2003-2018 Anope Team
  * Contact us at team@anope.org
  *
  * Please read COPYING and README for further details.

modules/encryption/enc_sha1.cpp

@@ -1,7 +1,7 @@
 /*
  *
  * Modified for Anope.
- * (C) 2006-2017 Anope Team
+ * (C) 2006-2018 Anope Team
  * Contact us at team@anope.org
 
 SHA-1 in C

modules/encryption/enc_sha256.cpp

@@ -5,7 +5,7 @@
  * IMPORTANT: DATA HASHES CANNOT BE "DECRYPTED" BACK TO PLAIN TEXT.
  *
  * Modified for Anope.
- * (C) 2003-2017 Anope Team
+ * (C) 2003-2018 Anope Team
  * Contact us at team@anope.org
  *
  * Taken from InspIRCd ( www.inspircd.org )