fix typos

openpkg-tool/openpkg.pod

@@ -94,7 +94,7 @@ The name of the resource stored in the index. The default is
 B<openpkg index> adds a platform attribute for binary RPMs. The
 attribute is built as I<%{arch}>C<->I<platform>C<->I<%{os}> where
 I<%{arch}> and I<%{os}> are taken from the RPM header and I<platform> is
-the value of the B<-p> option. The default value is "C<unkown>". This
+the value of the B<-p> option. The default value is "C<unknown>". This
 must be used to distinguish between platforms that support the same
 Architecture and OS name like various Linux distributions.
 
@@ -176,7 +176,7 @@ is already installed.
 
 =item B<-Z>
 
-B<openpkg build> ignores a installed packages, the
+B<openpkg build> ignores all installed packages, the
 script will rebuild all selected packages from scratch. 
 Note that this doesn't work together with the B<-a> option.