Bacpported fix for CORE-3001: Install fails to create user & group "firebird"

builds/install/misc/posixLibrary.sh.in

@@ -1,6 +1,19 @@
 #!/bin/sh
 
 
+#------------------------------------------------------------------------
+# Adds parameter to $PATH if it's missing in it
+
+Add2Path() {
+	Dir=${1}
+	x=`echo :${PATH}: | grep :$Dir:`
+	if [ -z "$x" ]
+	then
+		PATH=$PATH:$Dir
+		export PATH
+	fi
+}
+
 #------------------------------------------------------------------------
 # Global stuff init
 
@@ -16,7 +29,9 @@ ArchiveDateTag=`date +"%Y%m%d_%H%M"`
 export ArchiveDateTag
 ArchiveMainFile="${FBRootDir}_${ArchiveDateTag}"
 export ArchiveMainFile
-
+#this solves a problem with sudo env missing sbin
+Add2Path /usr/sbin
+Add2Path /sbin
 
 #------------------------------------------------------------------------
 # Create temporary file. In case mktemp failed, do something...