configure: remove unneeded branch in bogus pkk-config check

The check for pkg-config is done only in mac os x and without
mozilla. So a branch that checks for mozilla enable is never
reached.

While at it fix a couple of typos

Change-Id: I910b2784426eba8978076ea5d1587a58e693a8b8

configure.in

@@ -1093,7 +1093,7 @@ AC_ARG_ENABLE(liblangtag,
 )
 
 AC_ARG_ENABLE(bogus-pkg-config,
-    AS_HELP_STRING([--enable-bogis-pkg-config],
+    AS_HELP_STRING([--enable-bogus-pkg-config],
         [MACOSX only: on MacOSX pkg-config can cause trouble. by default if one is found in the PATH, an error is issued. This flag turn that error into a warning.]),
 )
 
@@ -4434,15 +4434,10 @@ if test $_os = Darwin -a "$enable_mozilla" = no; then
         if test "$PKG_CONFIG" = /usr/bin/pkg-config && ls -l /usr/bin/pkg-config | $GREP -q Mono.framework; then
             AC_MSG_ERROR([yes, from Mono. This *will* break the build. Please remove or hide $PKG_CONFIG])
         else
-            if test "$enable_mozilla" = "yes"; then
-                AC_MSG_RESULT([yes, from unkown origin])
-                add_warning "Having a $PKG_CONFIG might have unexpected consequences, please consider hiding it"
+            if test "$enable_bogus_pkg_config" = "yes"; then
+                AC_MSG_RESULT([yes, user-approved from unknown origin.])
             else
-                if test "$enable_bogus_pkg_config" = "yes"; then
-                    AC_MSG_RESULT([yes, user-approved from unkown origin.])
-                else
-                   AC_MSG_ERROR([yes, from unknown origin. This *will* break the build. Please remove or hide $PKG_CONFIG])
-                fi
+                AC_MSG_ERROR([yes, from unknown origin. This *will* break the build. Please remove or hide $PKG_CONFIG])
             fi
         fi
     else