community/enscript: fix build with gcc 15

Fix getenv/getopt and other function prototypes with gcc 15.

```
getopt.c:366:21: error: too many arguments to function 'getenv'; expected 0, have 1
  366 |   posixly_correct = getenv ("POSIXLY_CORRECT");
      |                     ^~~~~~  ~~~~~~~~~~~~~~~~~
getopt.c:214:7: note: declared here
  214 | char *getenv ();
      |       ^~~~~~
```

```
getopt.c:922:1: error: number of arguments doesn't match prototype
  922 | {
      | ^
In file included from getopt.c:113:
getopt.h:108:12: error: prototype declaration
  108 | extern int getopt ();
      |            ^~~~~~
```

```
regex.c:3565:13: error: too many arguments to function 're_match_2_internal'; expected 0, have 8
 3565 |       val = re_match_2_internal (bufp, string1, size1, string2, size2,
      |             ^~~~~~~~~~~~~~~~~~~  ~~~~
regex.c:339:12: note: declared here
  339 | static int re_match_2_internal ();
      |            ^~~~~~~~~~~~~~~~~~~
```

community/enscript/APKBUILD

@@ -1,7 +1,7 @@
 # Maintainer: André Klitzing <aklitzing@gmail.com>
 pkgname=enscript
 pkgver=1.6.6
-pkgrel=6
+pkgrel=7
 pkgdesc="GNU Enscript converts ASCII files to PostScript, HTML, or RTF"
 url="https://www.gnu.org/software/enscript/"
 arch="all"
@@ -9,6 +9,8 @@ license="GPL-3.0-only"
 subpackages="$pkgname-doc"
 source="https://ftp.gnu.org/gnu/enscript/enscript-$pkgver.tar.gz
 	gcc14-implicit-function-declaration.patch
+	gcc15-getopt.patch
+	gcc15-regex.patch
 	"
 
 prepare() {
@@ -38,4 +40,6 @@ package() {
 sha512sums="
 bf1c2b9ea7723518a1ef312145ddcd6ffdef0c6e8b5795ea84cb55d76fccc02f441d0c2dc6897e970368186e6a829ab74a090716624e0f7a8f575653fa495ebc  enscript-1.6.6.tar.gz
 8534bd60a6f0a2b066fa52ad734c84ff6b9abae859c88550be4a9e93400f25d4520a5b39c0e0995d21d1bb661716806e6d8c2dd04d1391a97b012c7ad1cb58ac  gcc14-implicit-function-declaration.patch
+ed2542d145d54e1139b5e5e456c9cebcfbf7a0255828d1ba70ccbee0641d0c7ce36d2fa7795dedcd242e4fa4b5ec27bf48bee927fe75ed6281e560f87137e8c9  gcc15-getopt.patch
+f5b5ef2716c617be16e58868ea4f547103b47eef0428555bea8db023f1675a0bf37c38eb6cb694a46a481baa02a32417c014eb33ab3c76fd6a6b8e9f40cd1354  gcc15-regex.patch
 "

community/enscript/gcc15-getopt.patch

@@ -0,0 +1,24 @@
+diff -ruN a/compat/getopt.c b/compat/getopt.c
+--- a/compat/getopt.c	2025-09-10 00:44:17.560000000 +0000
++++ b/compat/getopt.c	2025-09-10 01:22:33.360000000 +0000
+@@ -211,7 +211,7 @@
+ /* Avoid depending on library functions or files
+    whose names are inconsistent.  */
+ 
+-char *getenv ();
++char *getenv (const char *);
+ 
+ static char *
+ my_index (str, chr)
+diff -ruN a/compat/getopt.h b/compat/getopt.h
+--- a/compat/getopt.h	2011-10-30 16:48:42.000000000 +0000
++++ b/compat/getopt.h	2025-09-10 01:21:26.450000000 +0000
+@@ -105,7 +105,7 @@
+    errors, only prototype getopt for the GNU C library.  */
+ extern int getopt (int argc, char *const *argv, const char *shortopts);
+ #else /* not __GNU_LIBRARY__ */
+-extern int getopt ();
++extern int getopt(int, char * const [], const char *);
+ #endif /* __GNU_LIBRARY__ */
+ extern int getopt_long (int argc, char *const *argv, const char *shortopts,
+ 		        const struct option *longopts, int *longind);

community/enscript/gcc15-regex.patch

@@ -0,0 +1,15 @@
+Patch-Source: https://src.fedoraproject.org/rpms/enscript/blob/9c673cf1082e06e133c14e9896b78a317b93359e/f/enscript-c23.patch
+---
+diff --git a/compat/regex.c b/compat/regex.c
+index c6907f3..87f2840 100644
+--- a/compat/regex.c
++++ b/compat/regex.c
+@@ -336,7 +336,7 @@ typedef char boolean;
+ #define false 0
+ #define true 1
+ 
+-static int re_match_2_internal ();
++static int re_match_2_internal (struct re_pattern_buffer*, const char*, int, const char*, int, int, struct re_registers*, int);
+ 
+ /* These are the command codes that appear in compiled regular
+    expressions.  Some opcodes are followed by argument bytes.  A