Parse user-defined macros before the global ones (closes: #5587).

Index: man-1.6g/man2html/man2html.c
===================================================================
--- man-1.6g.orig/man2html/man2html.c	2011-01-09 11:20:58.000000000 +0100
+++ man-1.6g/man2html/man2html.c	2011-01-09 11:21:22.000000000 +0100
@@ -1697,7 +1697,42 @@
 	    c = scan_escape(c+1);
     } else {
 	i=V(c[0],c[1]);
-	switch (i) {
+        /* search macro database of self-defined macros */
+	owndef = find_longstrdef(defdef, i, c, NULL);
+	if (owndef) {
+		char **oldargument;
+		int deflen;
+		int onff;
+		sl=fill_words(c+strlen(owndef->longname), wordlist, SIZE(wordlist), &words, '\n');
+		c=sl+1;
+		*sl=0;
+		for (i=1; i<words; i++)
+		    wordlist[i][-1]=0;
+		for (i=0; i<words; i++) {
+		    char *h=NULL;
+		    if (mandoc_command)
+			 scan_troff_mandoc(wordlist[i],1,&h);
+		    else
+			 scan_troff(wordlist[i],1,&h);
+		    wordlist[i]=h;
+		}
+		for (i=words; i<SIZE(wordlist); i++)
+		    wordlist[i]=NULL;
+		deflen = strlen(owndef->st);
+		owndef->st[deflen+1]='a';
+		for (i=0; (owndef->st[deflen+2+i] = owndef->st[i]); i++);
+		oldargument=argument;
+		argument=wordlist;
+		onff=newline_for_fun;
+		if (mandoc_command)
+		     scan_troff_mandoc(owndef->st+deflen+2, 0, NULL);
+		else
+		     scan_troff(owndef->st+deflen+2, 0, NULL);
+		newline_for_fun=onff;
+		argument=oldargument;
+		for (i=0; i<words; i++) if (wordlist[i]) free(wordlist[i]);
+		*sl='\n';
+	} else switch (i) {
 	case V('a','b'):
 	    h=c+j;
 	    while (*h && *h !='\n') h++;
@@ -2894,42 +2929,7 @@
         /* ----- end of BSD mandoc stuff ----- */
 
  	default:
-             /* search macro database of self-defined macros */
-	    owndef = find_longstrdef(defdef, i, c, NULL);
-	    if (owndef) {
-		char **oldargument;
-		int deflen;
-		int onff;
-		sl=fill_words(c+strlen(owndef->longname), wordlist, SIZE(wordlist), &words, '\n');
-		c=sl+1;
-		*sl=0;
-		for (i=1; i<words; i++)
-		    wordlist[i][-1]=0;
-		for (i=0; i<words; i++) {
-		    char *h=NULL;
-		    if (mandoc_command)
-			 scan_troff_mandoc(wordlist[i],1,&h);
-		    else
-			 scan_troff(wordlist[i],1,&h);
-		    wordlist[i]=h;
-		}
-		for (i=words; i<SIZE(wordlist); i++)
-		    wordlist[i]=NULL;
-		deflen = strlen(owndef->st);
-		owndef->st[deflen+1]='a';
-		for (i=0; (owndef->st[deflen+2+i] = owndef->st[i]); i++);
-		oldargument=argument;
-		argument=wordlist;
-		onff=newline_for_fun;
-		if (mandoc_command)
-		     scan_troff_mandoc(owndef->st+deflen+2, 0, NULL);
-		else
-		     scan_troff(owndef->st+deflen+2, 0, NULL);
-		newline_for_fun=onff;
-		argument=oldargument;
-		for (i=0; i<words; i++) if (wordlist[i]) free(wordlist[i]);
-		*sl='\n';
-	    } else if (mandoc_command && 
+	    if (mandoc_command &&
 		       ((isupper(*c) && islower(c[1]))
 			|| (islower(*c) && isupper(c[1])))) {
 		 /*