Improve accepted command line options This commit enables getopt case sensitivity and adds all command line options/abbreviations typically supported by LDAP clients: -w/-y, -p, -x, -Z/-ZZ, -v

Support arrays/hashes in 'env' (WIP) - 'env' now prints 'attributes' array - 'env' output now supports any data type, not just strings - option --attributes on command line properly overrides config values The remaining thing to do is to support 'setenv' to work with non-strings too.

Add alias, unalias, configfile - Add commands 'alias' and 'unalias'. Behavior is almost identical to shell. Aliases currently cannot override commands. - Add command 'configfile'. Allows loading / saving config files from command line.