* configure.ac: Fix configure.ac bashisms

Reported-by: Brian Inglis

configure.ac

@@ -392,13 +392,13 @@ if test "$enable_doc" = yes; then
   if test -n "$DOXYGEN" || test -n "$PANDOC"; then
     LIBWGET_DOCS_INFO="yes (found:"
     if test -n "$DOXYGEN"; then
-      LIBWGET_DOCS_INFO+=" Doxygen)"
+      LIBWGET_DOCS_INFO="$LIBWGET_DOCS_INFO Doxygen)"
 	else
 	  LIBWGET_DOCS_INFO="no"
     fi
     WGET2_DOCS_INFO="yes (found:"
     if test -n "$PANDOC"; then
-      WGET2_DOCS_INFO+=" Pandoc)"
+      WGET2_DOCS_INFO="$WGET2_DOCS_INFO Pandoc)"
 	else
 	  WGET2_DOCS_INFO="no"
     fi
@@ -482,7 +482,7 @@ PKG_PROG_PKG_CONFIG
 
 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl], [Use SSL/TLS with specified library. Options: 'gnutls' (default), 'openssl', 'wolfssl' or 'none']), with_ssl=$withval, with_ssl=gnutls)
 
-AS_IF([test "x$with_ssl" == xyes], [with_ssl=gnutls])
+AS_IF([test "x$with_ssl" = xyes], [with_ssl=gnutls])
 
 PKG_CHECK_MODULES([GNUTLS], [gnutls], [
   with_gnutls=yes
@@ -492,20 +492,20 @@ PKG_CHECK_MODULES([GNUTLS], [gnutls], [
     [with_gnutls=no;  AC_MSG_WARN(*** GNUTLS was not found. You will not be able to use HTTPS, nor run the OCSP tests. Fallback to libnettle for hashing and checksumming.)])
 ])
 
-AS_IF([test "x$with_ssl" == "xgnutls"], [
-  AS_IF([test "x$with_gnutls" == xyes], [
+AS_IF([test "x$with_ssl" = "xgnutls"], [
+  AS_IF([test "x$with_gnutls" = xyes], [
     LIBS="$GNUTLS_LIBS $LIBS"
     CFLAGS="$GNUTLS_CFLAGS $CFLAGS"
     AC_DEFINE([WITH_GNUTLS], [1], [Use GnuTLS])
     AC_SEARCH_LIBS(gnutls_hash, gnutls, [with_gnutls_hash=yes])
-    AS_IF([test "x$with_gnutls_hash" == xyes],
+    AS_IF([test "x$with_gnutls_hash" = xyes],
       [AC_CHECK_HEADERS([gnutls/crypto.h], [], [], [#include <gnutls/gnutls.h>])])
     AC_CHECK_HEADERS([gnutls/ocsp.h],
       [AC_DEFINE([WITH_OCSP], [1], [OCSP is supported])],
       [AC_MSG_WARN(*** Header file gnutls/ocsp.h was not found. OCSP will be disabled.)])
     AC_CHECK_FUNCS(gnutls_srp_server_get_username gnutls_transport_get_int)
   ])
-], [test "x$with_ssl" == "xopenssl"], [
+], [test "x$with_ssl" = "xopenssl"], [
   PKG_CHECK_MODULES([OPENSSL], [openssl], [
     with_openssl=yes
     LIBS="$OPENSSL_LIBS $LIBS"
@@ -518,7 +518,7 @@ AS_IF([test "x$with_ssl" == "xgnutls"], [
     ])
   ])
 
-  AS_IF([test "x$with_openssl" == xyes], [
+  AS_IF([test "x$with_openssl" = xyes], [
     AC_CHECK_HEADERS([openssl/ssl.h])
     AC_CHECK_HEADERS([openssl/x509_vfy.h])
     AC_CHECK_HEADERS([openssl/ocsp.h],
@@ -552,9 +552,9 @@ AS_IF([test "x$with_ssl" == "xgnutls"], [
   AC_MSG_ERROR([*** Unsupported value for --with-ssl. Use 'gnutls' (default), 'openssl', 'wolfssl' or 'none'])
 ])
 
-AM_CONDITIONAL([WITH_GNUTLS], [test "x$with_ssl" = xgnutls && test "x$with_gnutls" == xyes])
-AM_CONDITIONAL([WITH_OPENSSL], [test "x$with_ssl" = xopenssl && test "x$with_openssl" == xyes])
-AM_CONDITIONAL([WITH_WOLFSSL], [test "x$with_ssl" = xwolfssl && test "x$with_wolfssl" == xyes])
+AM_CONDITIONAL([WITH_GNUTLS], [test "x$with_ssl" = xgnutls && test "x$with_gnutls" = xyes])
+AM_CONDITIONAL([WITH_OPENSSL], [test "x$with_ssl" = xopenssl && test "x$with_openssl" = xyes])
+AM_CONDITIONAL([WITH_WOLFSSL], [test "x$with_ssl" = xwolfssl && test "x$with_wolfssl" = xyes])
 
 AM_CONDITIONAL([WITH_TLS], [test "x$with_gnutls" = xyes || test "x$with_wolfssl" = xyes || test "x$with_openssl" = xyes])
 AS_IF([test "x$with_gnutls" = xyes || test "x$with_wolfssl" = xyes || test "x$with_openssl" = xyes], [
@@ -843,7 +843,7 @@ AS_IF([test "x$with_libmicrohttpd" != xno], [
   CFLAGS=$old_CFLAGS
 ])
 
-AS_IF([test "x$with_gnutls" == xyes], [
+AS_IF([test "x$with_gnutls" = xyes], [
   TEST_LIBS="$TEST_LIBS $GNUTLS_LIBS"
   TEST_CFLAGS="$TEST_CFLAGS $GNUTLS_CFLAGS"
   AC_DEFINE([WITH_GNUTLS_IN_TESTSUITE], [1], [GnuTLS is available for test suite])],
@@ -925,9 +925,9 @@ AC_CONFIG_FILES([Makefile
 AC_OUTPUT
 
 # Check if expected TLS library was found and print it
-AS_IF([test "x$with_ssl" == xwolfssl && test "x$with_wolfssl" == xno], [ssl_enabled="(not found)"],
-  [test "x$with_ssl" == xopenssl && test "x$with_openssl" == xno], [ssl_enabled="(not found)"],
-  [test "x$with_ssl" == xgnutls && test "x$with_gnutls" == xno], [ssl_enabled="(not found)"],
+AS_IF([test "x$with_ssl" = xwolfssl && test "x$with_wolfssl" = xno], [ssl_enabled="(not found)"],
+  [test "x$with_ssl" = xopenssl && test "x$with_openssl" = xno], [ssl_enabled="(not found)"],
+  [test "x$with_ssl" = xgnutls && test "x$with_gnutls" = xno], [ssl_enabled="(not found)"],
   [])
 
 # patching libtool, generated when coming here