fix for nginx.pm default installation

auto/lib/perl/conf

diff --git a/auto/lib/perl/conf b/auto/lib/perl/conf
index 2ecaf3a..3f7b908 100644
--- a/auto/lib/perl/conf
+++ b/auto/lib/perl/conf
@@ -47,6 +47,7 @@
     if test -n "$NGX_PERL_MODULES"; then
         have=NGX_PERL_MODULES value="(u_char *) \"$NGX_PERL_MODULES\""
         . auto/define
+        NGX_PERL_MODULES_MAN=$NGX_PERL_MODULES/man3
     fi
 
 else

auto/lib/perl/make

diff --git a/auto/lib/perl/make b/auto/lib/perl/make
index aa54ab8..e9d8435 100644
--- a/auto/lib/perl/make
+++ b/auto/lib/perl/make
@@ -31,6 +31,6 @@
 			NGX_OBJS=$NGX_OBJS				\
 		$NGX_PERL Makefile.PL					\
 			LIB=$NGX_PERL_MODULES				\
-			INSTALLSITEMAN3DIR=$NGX_PERL_MODULES/man3
+			INSTALLSITEMAN3DIR=$NGX_PERL_MODULES_MAN
 
 END