fixed #39 commands that need LOCK_SH fail as non-root

pear/PEAR/Registry.php

@@ -276,7 +276,7 @@ class PEAR_Registry extends PEAR
             }
             $open_mode = 'w';
             // XXX People reported problems with LOCK_SH and 'w'
-            if ($mode === LOCK_SH) {
+            if ($mode === LOCK_SH || $mode === LOCK_UN) {
                 if (@!is_file($this->lockfile)) {
                     touch($this->lockfile);
                 }

pear/package-PEAR.xml

@@ -70,6 +70,7 @@ PEAR Installer:
 * Fixed optional dependencies in Dependency.php
 * Fix #25322 - bad md5sum should be fatal error
 * Package uninstall now also removes empty directories
+* Fixed locking problems for reading commands (pear list, pear info)
 
 OS_Guess Class: