Drop support for Erlang/OTP R16

Yaws generally supports the five most recent major versions of
Erlang/OTP, so drop R16 since Erlang 21 has been out for awhile.

.travis.yml

@@ -22,10 +22,6 @@ otp_release:
   - 17.3
   - 17.1
   - 17.0
-  - R16B03-1
-  - R16B03
-  - R16B02
-  - R16B01
 
 env:
   global:

README.md

@@ -7,7 +7,7 @@ Prepare build
 
 Get and install an Erlang system (http://www.erlang.org).
 
-**To compile Yaws, Erlang/OTP R16B01 or higher is required.**
+**To compile Yaws, Erlang/OTP R17 or higher is required.**
 
 If you've cloned the source from github and you want to build using autotools,
 note there is no ./configure script in the source, so create one:

README.osx

@@ -1,7 +1,7 @@
 # Homebrew on OSX
 
 If you develop on OS X (Mavericks, Mountain Lion, Lion, Snow Leopard), the
-Yaws formula works correctly for users of Erlang/OTP R16B01 and above. To
+Yaws formula works correctly for users of Erlang/OTP R17 and above. To
 install please run:
 
     brew install yaws

configure.ac

@@ -203,10 +203,10 @@ dnl Get ERTS version.
 ERLANG_CHECK_ERTS
 ERLANG_CHECK_RELEASE
 
-dnl Require Erlang >=R16B01 (ERTS 5.10.2) is required.
-AX_COMPARE_VERSION([${ERLANG_ERTS_VER}], [ge], [5.10.2],
+dnl Require Erlang >=R17 (ERTS 6.0) is required.
+AX_COMPARE_VERSION([${ERLANG_ERTS_VER}], [ge], [6.0],
     [],
-    [AC_MSG_ERROR([Erlang R16B01 or higher is required but only Erlang $ERLANG_RELEASE was found!])])
+    [AC_MSG_ERROR([Erlang R17 or higher is required but only Erlang $ERLANG_RELEASE was found!])])
 
 dnl Determine directories for installation.
 if test "x${prefix}" != "xNONE" -a "x${ERLANG_INSTALL_LIB_DIR}" = "x"; then

doc/yaws.tex

@@ -193,7 +193,7 @@ \subsection{Compile and Install}
 
 To compile and install a \Yaws\  release
 one of the prerequisites is a properly installed \Erlang\  system. \Yaws\
-runs on \Erlang\/OTP releases R16B01 and newer. Get \Erlang\  from
+runs on \Erlang\/OTP releases R17 and newer. Get \Erlang\  from
 \url{http://www.erlang.org/}
 
 Compile and install is straight forward:

rebar.config

@@ -1,6 +1,6 @@
 %% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
 %% ex: ft=erlang ts=4 sw=4 et
-{require_min_otp_vsn, "R16B01"}.
+{require_min_otp_vsn, "R17"}.
 
 {sub_dirs, ["rel"]}.
 

www/configuration.yaws

@@ -30,7 +30,7 @@ out(A) ->
     are required. (All code example below on Ubuntu)
   </p>
   <p>
-  <strong>NOTE: Erlang/OTP R16B01 or higher is required.</strong>
+  <strong>NOTE: Erlang/OTP R17 or higher is required.</strong>
   </p>
   <ul>
     <li>