bugfix: web/.phpPgAdmin/.htaccess: custom pages: need to handle in query string because .php filename would be treated as path element

web/.phpPgAdmin/.htaccess: support custom .php pages

bugfix: web/.phpPgAdmin/.htaccess: work around phpPgAdmin bug that causes page to be ignored when not logged in

web/.phpPgAdmin/.htaccess: extract path components 1st->last: documented that can't use subject param for this because that goes to the last selected tab, not the default (leftmost) tab

web/.phpPgAdmin/.htaccess: support linking to a function

web/.phpPgAdmin/.htaccess: support linking to the functions list

web/.phpPgAdmin/.htaccess: support linking to a view

web/.phpPgAdmin/.htaccess: allow linking directly to the views list of a schema

web/.phpPgAdmin/.htaccess: refactored to build the URL incrementally, extracting path components 1st->last, instead of handling each # of path components as a separate case (which was more rigid and created unnecessary duplication)

bugfix: web/.phpPgAdmin/.htaccess: path RewriteRules: need to go directly to the applicable tab, rather than going via redirect.php, because redirect.php will use the last selected tab, rather than the first tab for that section, leading to unexpected results when a non-default tab was previously selected