Latest round of fixes per RM and AL.  Fix bugs found in man.c.

@@ -26,10 +26,11 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /*
  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  */
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/param.h>

@@ -174,20 +175,28 @@
 static void
 sbuf_need(struct sbuf *sbuf, int nchars)
 {
         char *new_content;
         size_t size, cntsize;
+        size_t grow = 128;
 
-        /* Double the size of the allocation until the buffer is big enough */
-        while (sbuf->end + nchars > sbuf->last) {
+        while (grow < nchars) {
+                grow += 128;    /* we grow in chunks of 128 bytes */
+        }
+
+        /* Grow if the buffer isn't big enough */
+        if (sbuf->end + nchars > sbuf->last) {
                 size = sbuf->last + 1 - sbuf->content;
-                size *= 2;
+                size += grow;
                 cntsize = sbuf->end - sbuf->content;
 
-                new_content = (char *)malloc(size);
-                (void) memcpy(new_content, sbuf->content, cntsize);
-                free(sbuf->content);
+                if ((new_content = realloc(sbuf->content, size)) == NULL) {
+                        perror("realloc");
+                        if (tempfile[0] != '\0')
+                                (void) unlink(tempfile);
+                        exit(1);
+                }
                 sbuf->content = new_content;
                 sbuf->end = new_content + cntsize;
                 sbuf->last = new_content + size - 1;
         }
 }

@@ -257,22 +266,23 @@
  */
 static int
 no_page_exists(char *dir, stringlist *names, char *suffix)
 {
         char    path[MAXPATHLEN];
+        char    *suffixes[] = { "", ".gz", ".bz2", NULL };
         size_t  i;
+        int     j;
 
         for (i = 0; i < names->sl_cur; i++) {
-                (void) snprintf(path, MAXPATHLEN, "%s/%s.%s.gz",
-                    dir, names->sl_str[i], suffix);
-                if (access(path, F_OK) < 0) {
-                        path[strlen(path) - 3] = '\0';
-                        if (access(path, F_OK) < 0)
-                                continue;
-                }
+                for (j = 0; suffixes[j] != NULL; j++) {
+                        (void) snprintf(path, MAXPATHLEN, "%s/%s.%s%s",
+                            dir, names->sl_str[i], suffix, suffixes[j]);
+                        if (access(path, F_OK) == 0) {
                 return (0);
         }
+                }
+        }
         return (1);
 }
 
 /* ARGSUSED sig */
 static void