c79ce843f4
When hexchat is already installed into a non-default prefix, a new build
could pick up ${prefix}/include/hexchat-plugin.h from the installed
version instead of the local header, as configuration variables such as
$(GLIB_CFLAGS) would point to -I${prefix}/include.
Reordering the includes and moving -I arguments to CPPFLAGS prevents
this, as it ensures the local directories are always searched first.
This was no problem when compiling for /usr or /usr/local as these
directories in the compiler search path are always searched last.
Closes #1822
HexChat 
HexChat is an IRC client for Windows and UNIX-like operating systems.
See IRCHelp.org for information about IRC in general.
For more information on HexChat please read our documentation:
X-Chat ("xchat") Copyright (c) 1998-2010 By Peter Zelezny. HexChat ("hexchat") Copyright (c) 2009-2014 By Berke Viktor. This program is released under the GPL v2 with the additional exemption that compiling, linking, and/or using OpenSSL is allowed. You may provide binary packages linked to the OpenSSL libraries, provided that all other requirements of the GPL are met. See file COPYING for details.