make: lint over all files that are `ok' for PHP...

Seeing PHP ignore text files makes it easier to lint over more
files for a simple reason:  maybe someone sneaked a PHP file
into the repo and forgot the proper file extension, which is not
uncommon for utilities in *bin/ -- makes it easier to catch those.

Makefile

@@ -25,10 +25,11 @@ install:
 	    xargs -n1 printf "/usr/local/%s\n"
 
 lint:
-	find ${.CURDIR}/src -name "*.class" -print0 | xargs -0 -n1 php -l
-	find ${.CURDIR}/src -name "*.inc" -print0 | xargs -0 -n1 php -l
-	find ${.CURDIR}/src -name "*.php" -print0 | xargs -0 -n1 php -l
-	find ${.CURDIR}/src -name "rc*" -print0 | xargs -0 -n1 php -l
+	find ${.CURDIR}/src ! -name "*.xml" ! -name "*.eot" \
+	    ! -name "*.svg" ! -name "*.woff" ! -name "*.woff2" \
+	    ! -name "*.otf" ! -name "*.png" ! -name "*.js" \
+	    ! -name "*.scss" ! -name "*.py" -type f -print0 | \
+	    xargs -0 -n1 php -l
 
 sweep:
 	find ${.CURDIR}/src ! -name "*.min.*" ! -name "*.svg" \